diff --git a/README.md b/README.md
index dda1e3a83..26783d12d 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Ethereum
 Ethereum Go Development package (C) Jeffrey Wilcke
 
 Ethereum is currently in its testing phase. The current state is "Proof
-of Concept 5.0 RC14". For build instructions see the [Wiki](https://github.com/ethereum/go-ethereum/wiki/Building-Ethereum(Go)).
+of Concept 0.5.15". For build instructions see the [Wiki](https://github.com/ethereum/go-ethereum/wiki/Building-Ethereum(Go)).
 
 Ethereum Go is split up in several sub packages Please refer to each
 individual package for more information.
diff --git a/ethchain/asm.go b/ethchain/asm.go
index 277326ff9..09d6af56f 100644
--- a/ethchain/asm.go
+++ b/ethchain/asm.go
@@ -18,7 +18,7 @@ func Disassemble(script []byte) (asm []string) {
 		// Get the opcode (it must be an opcode!)
 		op := OpCode(val)
 
-		asm = append(asm, fmt.Sprintf("%v", op))
+		asm = append(asm, fmt.Sprintf("%04v: %v", pc, op))
 
 		switch op {
 		case PUSH1, PUSH2, PUSH3, PUSH4, PUSH5, PUSH6, PUSH7, PUSH8, PUSH9, PUSH10, PUSH11, PUSH12, PUSH13, PUSH14, PUSH15, PUSH16, PUSH17, PUSH18, PUSH19, PUSH20, PUSH21, PUSH22, PUSH23, PUSH24, PUSH25, PUSH26, PUSH27, PUSH28, PUSH29, PUSH30, PUSH31, PUSH32:
@@ -28,7 +28,7 @@ func Disassemble(script []byte) (asm []string) {
 			if len(data) == 0 {
 				data = []byte{0}
 			}
-			asm = append(asm, fmt.Sprintf("0x%x", data))
+			asm = append(asm, fmt.Sprintf("%04v: 0x%x", pc, data))
 
 			pc.Add(pc, big.NewInt(a-1))
 		}
diff --git a/ethchain/block_chain.go b/ethchain/block_chain.go
index 19b5248d7..d0fea6641 100644
--- a/ethchain/block_chain.go
+++ b/ethchain/block_chain.go
@@ -2,13 +2,15 @@ package ethchain
 
 import (
 	"bytes"
+	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/ethereum/eth-go/ethwire"
-	"log"
 	"math"
 	"math/big"
 )
 
+var chainlogger = ethlog.NewLogger("CHAIN")
+
 type BlockChain struct {
 	Ethereum EthManager
 	// The famous, the fabulous Mister GENESIIIIIIS (block)
@@ -129,38 +131,38 @@ func (bc *BlockChain) FindCanonicalChain(blocks []*Block, commonBlockHash []byte
 	// Start with the newest block we got, all the way back to the common block we both know
 	for _, block := range blocks {
 		if bytes.Compare(block.Hash(), commonBlockHash) == 0 {
-			log.Println("[CHAIN] We have found the common parent block, breaking")
+			chainlogger.Infoln("[CHAIN] We have found the common parent block, breaking")
 			break
 		}
 		chainDifficulty.Add(chainDifficulty, bc.CalculateBlockTD(block))
 	}
 
-	log.Println("[CHAIN] Incoming chain difficulty:", chainDifficulty)
+	chainlogger.Infoln("Incoming chain difficulty:", chainDifficulty)
 
 	curChainDifficulty := new(big.Int)
 	block := bc.CurrentBlock
 	for i := 0; block != nil; block = bc.GetBlock(block.PrevHash) {
 		i++
 		if bytes.Compare(block.Hash(), commonBlockHash) == 0 {
-			log.Println("[CHAIN] We have found the common parent block, breaking")
+			chainlogger.Infoln("We have found the common parent block, breaking")
 			break
 		}
 		anOtherBlock := bc.GetBlock(block.PrevHash)
 		if anOtherBlock == nil {
 			// We do not want to count the genesis block for difficulty since that's not being sent
-			log.Println("[CHAIN] At genesis block, breaking")
+			chainlogger.Infoln("At genesis block, breaking")
 			break
 		}
 		curChainDifficulty.Add(curChainDifficulty, bc.CalculateBlockTD(block))
 	}
 
-	log.Println("[CHAIN] Current chain difficulty:", curChainDifficulty)
+	chainlogger.Infoln("Current chain difficulty:", curChainDifficulty)
 	if chainDifficulty.Cmp(curChainDifficulty) == 1 {
-		log.Printf("[CHAIN] The incoming Chain beat our asses, resetting to block: %x", commonBlockHash)
+		chainlogger.Infof("The incoming Chain beat our asses, resetting to block: %x", commonBlockHash)
 		bc.ResetTillBlockHash(commonBlockHash)
 		return false
 	} else {
-		log.Println("[CHAIN] Our chain showed the incoming chain who is boss. Ignoring.")
+		chainlogger.Infoln("Our chain showed the incoming chain who is boss. Ignoring.")
 		return true
 	}
 }
@@ -174,18 +176,12 @@ func (bc *BlockChain) ResetTillBlockHash(hash []byte) error {
 		bc.LastBlockHash = bc.genesisBlock.Hash()
 		bc.LastBlockNumber = 1
 	} else {
-		// TODO: Somehow this doesn't really give the right numbers, double check.
-		// TODO: Change logs into debug lines
 		returnTo = bc.GetBlock(hash)
 		bc.CurrentBlock = returnTo
 		bc.LastBlockHash = returnTo.Hash()
-		//info := bc.BlockInfo(returnTo)
 		bc.LastBlockNumber = returnTo.Number.Uint64()
 	}
 
-	// XXX Why are we resetting? This is the block chain, it has nothing to do with states
-	//bc.Ethereum.StateManager().PrepareDefault(returnTo)
-
 	// Manually reset the last sync block
 	err := ethutil.Config.Db.Delete(lastBlock.Hash())
 	if err != nil {
@@ -195,7 +191,7 @@ func (bc *BlockChain) ResetTillBlockHash(hash []byte) error {
 	var block *Block
 	for ; block != nil; block = bc.GetBlock(block.PrevHash) {
 		if bytes.Compare(block.Hash(), hash) == 0 {
-			log.Println("[CHAIN] We have arrived at the the common parent block, breaking")
+			chainlogger.Infoln("We have arrived at the the common parent block, breaking")
 			break
 		}
 		err = ethutil.Config.Db.Delete(block.Hash())
@@ -203,7 +199,7 @@ func (bc *BlockChain) ResetTillBlockHash(hash []byte) error {
 			return err
 		}
 	}
-	log.Println("[CHAIN] Split chain deleted and reverted to common parent block.")
+	chainlogger.Infoln("Split chain deleted and reverted to common parent block.")
 	return nil
 }
 
@@ -231,6 +227,11 @@ func (bc *BlockChain) GetChainFromHash(hash []byte, max uint64) []interface{} {
 	for i := uint64(0); bytes.Compare(currentHash, hash) != 0 && num >= parentNumber && i < count; i++ {
 		// Get the block of the chain
 		block := bc.GetBlock(currentHash)
+		if block == nil {
+			chainlogger.Debugf("Unexpected error during GetChainFromHash: Unable to find %x\n", currentHash)
+			break
+		}
+
 		currentHash = block.PrevHash
 
 		chain = append(chain, block.Value().Val)
@@ -286,7 +287,7 @@ func (bc *BlockChain) setLastBlock() {
 		bc.LastBlockHash = block.Hash()
 		bc.LastBlockNumber = block.Number.Uint64()
 
-		ethutil.Config.Log.Infof("[CHAIN] Last known block height #%d\n", bc.LastBlockNumber)
+		chainlogger.Infof("Last known block height #%d\n", bc.LastBlockNumber)
 	} else {
 		AddTestNetFunds(bc.genesisBlock)
 
@@ -294,14 +295,14 @@ func (bc *BlockChain) setLastBlock() {
 		// Prepare the genesis block
 		bc.Add(bc.genesisBlock)
 
-		//log.Printf("root %x\n", bm.bc.genesisBlock.State().Root)
+		//chainlogger.Infof("root %x\n", bm.bc.genesisBlock.State().Root)
 		//bm.bc.genesisBlock.PrintHash()
 	}
 
 	// Set the last know difficulty (might be 0x0 as initial value, Genesis)
 	bc.TD = ethutil.BigD(ethutil.Config.Db.LastKnownTD())
 
-	ethutil.Config.Log.Infof("Last block: %x\n", bc.CurrentBlock.Hash())
+	chainlogger.Infof("Last block: %x\n", bc.CurrentBlock.Hash())
 }
 
 func (bc *BlockChain) SetTotalDifficulty(td *big.Int) {
@@ -358,6 +359,6 @@ func (bc *BlockChain) writeBlockInfo(block *Block) {
 
 func (bc *BlockChain) Stop() {
 	if bc.CurrentBlock != nil {
-		log.Println("[CHAIN] Stopped")
+		chainlogger.Infoln("Stopped")
 	}
 }
diff --git a/ethchain/dagger.go b/ethchain/dagger.go
index 565e1e447..08c4826db 100644
--- a/ethchain/dagger.go
+++ b/ethchain/dagger.go
@@ -1,15 +1,17 @@
 package ethchain
 
 import (
+	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/obscuren/sha3"
 	"hash"
-	"log"
 	"math/big"
 	"math/rand"
 	"time"
 )
 
+var powlogger = ethlog.NewLogger("POW")
+
 type PoW interface {
 	Search(block *Block, reactChan chan ethutil.React) []byte
 	Verify(hash []byte, diff *big.Int, nonce []byte) bool
@@ -29,14 +31,13 @@ func (pow *EasyPow) Search(block *Block, reactChan chan ethutil.React) []byte {
 	for {
 		select {
 		case <-reactChan:
-			//ethutil.Config.Log.Infoln("[POW] Received reactor event; breaking out.")
 			return nil
 		default:
 			i++
 			if i%1234567 == 0 {
 				elapsed := time.Now().UnixNano() - start
 				hashes := ((float64(1e9) / float64(elapsed)) * float64(i)) / 1000
-				ethutil.Config.Log.Infoln("[POW] Hashing @", int64(hashes), "khash")
+				powlogger.Infoln("Hashing @", int64(hashes), "khash")
 			}
 
 			sha := ethutil.Sha3Bin(big.NewInt(r.Int63()).Bytes())
@@ -81,7 +82,7 @@ func (dag *Dagger) Find(obj *big.Int, resChan chan int64) {
 		rnd := r.Int63()
 
 		res := dag.Eval(big.NewInt(rnd))
-		log.Printf("rnd %v\nres %v\nobj %v\n", rnd, res, obj)
+		powlogger.Infof("rnd %v\nres %v\nobj %v\n", rnd, res, obj)
 		if res.Cmp(obj) < 0 {
 			// Post back result on the channel
 			resChan <- rnd
diff --git a/ethchain/state.go b/ethchain/state.go
index a08dfac83..e28b91909 100644
--- a/ethchain/state.go
+++ b/ethchain/state.go
@@ -125,7 +125,7 @@ func (self *State) GetOrNewStateObject(addr []byte) *StateObject {
 }
 
 func (self *State) NewStateObject(addr []byte) *StateObject {
-	ethutil.Config.Log.Printf(ethutil.LogLevelInfo, "(+) %x\n", addr)
+	statelogger.Infof("(+) %x\n", addr)
 
 	stateObject := NewStateObject(addr)
 	self.stateObjects[string(addr)] = stateObject
diff --git a/ethchain/state_manager.go b/ethchain/state_manager.go
index 36ba1731c..312ba3084 100644
--- a/ethchain/state_manager.go
+++ b/ethchain/state_manager.go
@@ -3,7 +3,7 @@ package ethchain
 import (
 	"bytes"
 	"container/list"
-	"fmt"
+	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/ethereum/eth-go/ethwire"
 	"math/big"
@@ -11,6 +11,8 @@ import (
 	"time"
 )
 
+var statelogger = ethlog.NewLogger("STATE")
+
 type BlockProcessor interface {
 	ProcessBlock(block *Block)
 }
@@ -120,7 +122,7 @@ done:
 
 				break done
 			default:
-				ethutil.Config.Log.Infoln(err)
+				statelogger.Infoln(err)
 			}
 		}
 
@@ -143,27 +145,23 @@ done:
 	return receipts, handled, unhandled, err
 }
 
-func (sm *StateManager) Process(block *Block, dontReact bool) error {
+func (sm *StateManager) Process(block *Block, dontReact bool) (err error) {
+	// Processing a blocks may never happen simultaneously
+	sm.mutex.Lock()
+	defer sm.mutex.Unlock()
+
+	if sm.bc.HasBlock(block.Hash()) {
+		return nil
+	}
+
 	if !sm.bc.HasBlock(block.PrevHash) {
 		return ParentError(block.PrevHash)
 	}
 
-	parent := sm.bc.GetBlock(block.PrevHash)
-
-	return sm.ProcessBlock(parent.State(), parent, block, dontReact)
-
-}
-
-// Block processing and validating with a given (temporarily) state
-func (sm *StateManager) ProcessBlock(state *State, parent, block *Block, dontReact bool) (err error) {
-	// Processing a blocks may never happen simultaneously
-	sm.mutex.Lock()
-	defer sm.mutex.Unlock()
-	hash := block.Hash()
-
-	if sm.bc.HasBlock(hash) {
-		return nil
-	}
+	var (
+		parent = sm.bc.GetBlock(block.PrevHash)
+		state  = parent.State()
+	)
 
 	// Defer the Undo on the Trie. If the block processing happened
 	// we don't want to undo but since undo only happens on dirty
@@ -171,44 +169,38 @@ func (sm *StateManager) ProcessBlock(state *State, parent, block *Block, dontRea
 	// before that.
 	defer state.Reset()
 
-	// Check if we have the parent hash, if it isn't known we discard it
-	// Reasons might be catching up or simply an invalid block
-	if !sm.bc.HasBlock(block.PrevHash) && sm.bc.CurrentBlock != nil {
-		return ParentError(block.PrevHash)
-	}
-
-	coinbase := state.GetOrNewStateObject(block.Coinbase)
-	coinbase.SetGasPool(block.CalcGasLimit(parent))
-
-	// Process the transactions on to current block
-	receipts, _, _, _ := sm.ProcessTransactions(coinbase, state, block, parent, block.Transactions())
+	receipts, err := sm.ApplyDiff(state, parent, block)
 	defer func() {
 		if err != nil {
 			if len(receipts) == len(block.Receipts()) {
 				for i, receipt := range block.Receipts() {
-					ethutil.Config.Log.Debugf("diff (r) %v ~ %x  <=>  (c) %v ~ %x (%x)\n", receipt.CumulativeGasUsed, receipt.PostState[0:4], receipts[i].CumulativeGasUsed, receipts[i].PostState[0:4], receipt.Tx.Hash())
+					statelogger.Debugf("diff (r) %v ~ %x  <=>  (c) %v ~ %x (%x)\n", receipt.CumulativeGasUsed, receipt.PostState[0:4], receipts[i].CumulativeGasUsed, receipts[i].PostState[0:4], receipt.Tx.Hash())
 				}
 			} else {
-				ethutil.Config.Log.Debugln("Unable to print receipt diff. Length didn't match", len(receipts), "for", len(block.Receipts()))
+				statelogger.Warnln("Unable to print receipt diff. Length didn't match", len(receipts), "for", len(block.Receipts()))
 			}
 		}
 	}()
 
+	if err != nil {
+		return err
+	}
+
 	// Block validation
 	if err = sm.ValidateBlock(block); err != nil {
-		fmt.Println("[SM] Error validating block:", err)
+		statelogger.Errorln("Error validating block:", err)
 		return err
 	}
 
 	// I'm not sure, but I don't know if there should be thrown
 	// any errors at this time.
 	if err = sm.AccumelateRewards(state, block); err != nil {
-		fmt.Println("[SM] Error accumulating reward", err)
+		statelogger.Errorln("Error accumulating reward", err)
 		return err
 	}
 
 	if !block.State().Cmp(state) {
-		err = fmt.Errorf("Invalid merkle root.\nrec: %x\nis:  %x", block.State().trie.Root, state.trie.Root)
+		statelogger.Errorf("Invalid merkle root.\nrec: %x\nis:  %x", block.State().trie.Root, state.trie.Root)
 		return
 	}
 
@@ -221,7 +213,7 @@ func (sm *StateManager) ProcessBlock(state *State, parent, block *Block, dontRea
 		sm.bc.Add(block)
 		sm.notifyChanges(state)
 
-		ethutil.Config.Log.Infof("[STATE] Added block #%d (%x)\n", block.Number, block.Hash())
+		statelogger.Infof("Added block #%d (%x)\n", block.Number, block.Hash())
 		if dontReact == false {
 			sm.Ethereum.Reactor().Post("newBlock", block)
 
@@ -232,11 +224,22 @@ func (sm *StateManager) ProcessBlock(state *State, parent, block *Block, dontRea
 
 		sm.Ethereum.TxPool().RemoveInvalid(state)
 	} else {
-		fmt.Println("total diff failed")
+		statelogger.Errorln("total diff failed")
 	}
 
 	return nil
 }
+
+func (sm *StateManager) ApplyDiff(state *State, parent, block *Block) (receipts Receipts, err error) {
+	coinbase := state.GetOrNewStateObject(block.Coinbase)
+	coinbase.SetGasPool(block.CalcGasLimit(parent))
+
+	// Process the transactions on to current block
+	receipts, _, _, _ = sm.ProcessTransactions(coinbase, state, block, parent, block.Transactions())
+
+	return receipts, nil
+}
+
 func (sm *StateManager) CalculateTD(block *Block) bool {
 	uncleDiff := new(big.Int)
 	for _, uncle := range block.Uncles {
diff --git a/ethchain/state_object.go b/ethchain/state_object.go
index 5b64c3b37..480b4055d 100644
--- a/ethchain/state_object.go
+++ b/ethchain/state_object.go
@@ -90,7 +90,13 @@ func (c *StateObject) SetAddr(addr []byte, value interface{}) {
 
 func (c *StateObject) SetStorage(num *big.Int, val *ethutil.Value) {
 	addr := ethutil.BigToBytes(num, 256)
-	//fmt.Printf("sstore %x => %v\n", addr, val)
+
+	if val.BigInt().Cmp(ethutil.Big0) == 0 {
+		c.state.trie.Delete(string(addr))
+
+		return
+	}
+
 	c.SetAddr(addr, val)
 }
 
@@ -124,13 +130,13 @@ func (c *StateObject) ReturnGas(gas, price *big.Int, state *State) {
 func (c *StateObject) AddAmount(amount *big.Int) {
 	c.SetAmount(new(big.Int).Add(c.Amount, amount))
 
-	ethutil.Config.Log.Printf(ethutil.LogLevelInfo, "%x: #%d %v (+ %v)\n", c.Address(), c.Nonce, c.Amount, amount)
+	statelogger.Infof("%x: #%d %v (+ %v)\n", c.Address(), c.Nonce, c.Amount, amount)
 }
 
 func (c *StateObject) SubAmount(amount *big.Int) {
 	c.SetAmount(new(big.Int).Sub(c.Amount, amount))
 
-	ethutil.Config.Log.Printf(ethutil.LogLevelInfo, "%x: #%d %v (- %v)\n", c.Address(), c.Nonce, c.Amount, amount)
+	statelogger.Infof("%x: #%d %v (- %v)\n", c.Address(), c.Nonce, c.Amount, amount)
 }
 
 func (c *StateObject) SetAmount(amount *big.Int) {
@@ -151,7 +157,7 @@ func (c *StateObject) ConvertGas(gas, price *big.Int) error {
 func (self *StateObject) SetGasPool(gasLimit *big.Int) {
 	self.gasPool = new(big.Int).Set(gasLimit)
 
-	ethutil.Config.Log.Printf(ethutil.LogLevelSystem, "%x: fuel (+ %v)", self.Address(), self.gasPool)
+	statelogger.DebugDetailf("%x: fuel (+ %v)", self.Address(), self.gasPool)
 }
 
 func (self *StateObject) BuyGas(gas, price *big.Int) error {
diff --git a/ethchain/state_transition.go b/ethchain/state_transition.go
index 1f5b4f959..f84c3486b 100644
--- a/ethchain/state_transition.go
+++ b/ethchain/state_transition.go
@@ -2,7 +2,6 @@ package ethchain
 
 import (
 	"fmt"
-	"github.com/ethereum/eth-go/ethutil"
 	"math/big"
 )
 
@@ -135,12 +134,12 @@ func (self *StateTransition) preCheck() (err error) {
 }
 
 func (self *StateTransition) TransitionState() (err error) {
-	ethutil.Config.Log.Printf(ethutil.LogLevelInfo, "(~) %x\n", self.tx.Hash())
+	statelogger.Infof("(~) %x\n", self.tx.Hash())
 
 	/*
 		defer func() {
 			if r := recover(); r != nil {
-				ethutil.Config.Log.Infoln(r)
+				logger.Infoln(r)
 				err = fmt.Errorf("state transition err %v", r)
 			}
 		}()
@@ -231,7 +230,7 @@ func (self *StateTransition) transferValue(sender, receiver *StateObject) error
 	// Add the amount to receivers account which should conclude this transaction
 	receiver.AddAmount(self.value)
 
-	//ethutil.Config.Log.Debugf("%x => %x (%v)\n", sender.Address()[:4], receiver.Address()[:4], self.value)
+	//statelogger.Debugf("%x => %x (%v)\n", sender.Address()[:4], receiver.Address()[:4], self.value)
 	//}
 
 	return nil
diff --git a/ethchain/transaction.go b/ethchain/transaction.go
index 34ab357a1..2ab681030 100644
--- a/ethchain/transaction.go
+++ b/ethchain/transaction.go
@@ -89,11 +89,12 @@ func (tx *Transaction) Signature(key []byte) []byte {
 func (tx *Transaction) PublicKey() []byte {
 	hash := tx.Hash()
 
-	// If we don't make a copy we will overwrite the existing underlying array
-	dst := make([]byte, len(tx.r))
-	copy(dst, tx.r)
+	r := make([]byte, 32-len(tx.r))
+	s := make([]byte, 32-len(tx.s))
+	r = append(r, ethutil.CopyBytes(tx.r)...)
+	s = append(s, ethutil.CopyBytes(tx.s)...)
 
-	sig := append(dst, tx.s...)
+	sig := append(r, s...)
 	sig = append(sig, tx.v-27)
 
 	pubkey, _ := secp256k1.RecoverPubkey(hash, sig)
@@ -127,6 +128,8 @@ func (tx *Transaction) Sign(privk []byte) error {
 func (tx *Transaction) RlpData() interface{} {
 	data := []interface{}{tx.Nonce, tx.GasPrice, tx.Gas, tx.Recipient, tx.Value, tx.Data}
 
+	// TODO Remove prefixing zero's
+
 	return append(data, tx.v, tx.r, tx.s)
 }
 
@@ -150,6 +153,7 @@ func (tx *Transaction) RlpValueDecode(decoder *ethutil.Value) {
 	tx.Value = decoder.Get(4).BigInt()
 	tx.Data = decoder.Get(5).Bytes()
 	tx.v = byte(decoder.Get(6).Uint())
+
 	tx.r = decoder.Get(7).Bytes()
 	tx.s = decoder.Get(8).Bytes()
 
diff --git a/ethchain/transaction_pool.go b/ethchain/transaction_pool.go
index 24836222a..6ab8d83d9 100644
--- a/ethchain/transaction_pool.go
+++ b/ethchain/transaction_pool.go
@@ -3,15 +3,15 @@ package ethchain
 import (
 	"bytes"
 	"container/list"
-	"errors"
 	"fmt"
-	"github.com/ethereum/eth-go/ethutil"
+	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethwire"
-	"log"
 	"math/big"
 	"sync"
 )
 
+var txplogger = ethlog.NewLogger("TXP")
+
 const (
 	txPoolQueueSize = 50
 )
@@ -97,7 +97,7 @@ func (pool *TxPool) ProcessTransaction(tx *Transaction, state *State, toContract
 	fmt.Printf("state root before update %x\n", state.Root())
 	defer func() {
 		if r := recover(); r != nil {
-			ethutil.Config.Log.Infoln(r)
+			txplogger.Infoln(r)
 			err = fmt.Errorf("%v", r)
 		}
 	}()
@@ -156,7 +156,7 @@ func (pool *TxPool) ProcessTransaction(tx *Transaction, state *State, toContract
 		fmt.Printf("state root after receiver update %x\n", state.Root())
 	}
 
-	ethutil.Config.Log.Infof("[TXPL] Processed Tx %x\n", tx.Hash())
+	txplogger.Infof("[TXPL] Processed Tx %x\n", tx.Hash())
 
 	return
 }
@@ -168,7 +168,7 @@ func (pool *TxPool) ValidateTransaction(tx *Transaction) error {
 	block := pool.Ethereum.BlockChain().CurrentBlock
 	// Something has gone horribly wrong if this happens
 	if block == nil {
-		return errors.New("[TXPL] No last block on the block chain")
+		return fmt.Errorf("[TXPL] No last block on the block chain")
 	}
 
 	if len(tx.Recipient) != 20 {
@@ -188,7 +188,7 @@ func (pool *TxPool) ValidateTransaction(tx *Transaction) error {
 
 	if tx.IsContract() {
 		if tx.GasPrice.Cmp(big.NewInt(minGasPrice)) < 0 {
-			return fmt.Errorf("[TXPL] Gasprice to low, %s given should be at least %d.", tx.GasPrice, minGasPrice)
+			return fmt.Errorf("[TXPL] Gasprice too low, %s given should be at least %d.", tx.GasPrice, minGasPrice)
 		}
 	}
 
@@ -215,12 +215,12 @@ out:
 			// Validate the transaction
 			err := pool.ValidateTransaction(tx)
 			if err != nil {
-				ethutil.Config.Log.Debugln("Validating Tx failed", err)
+				txplogger.Debugln("Validating Tx failed", err)
 			} else {
 				// Call blocking version.
 				pool.addTransaction(tx)
 
-				ethutil.Config.Log.Debugf("(t) %x => %x (%v) %x\n", tx.Sender()[:4], tx.Recipient[:4], tx.Value, tx.Hash())
+				txplogger.Debugf("(t) %x => %x (%v) %x\n", tx.Sender()[:4], tx.Recipient[:4], tx.Value, tx.Hash())
 
 				// Notify the subscribers
 				pool.Ethereum.Reactor().Post("newTx:pre", tx)
@@ -282,5 +282,5 @@ func (pool *TxPool) Stop() {
 
 	pool.Flush()
 
-	log.Println("[TXP] Stopped")
+	txplogger.Infoln("Stopped")
 }
diff --git a/ethchain/vm.go b/ethchain/vm.go
index fc3c37dc1..82591e274 100644
--- a/ethchain/vm.go
+++ b/ethchain/vm.go
@@ -2,11 +2,14 @@ package ethchain
 
 import (
 	"fmt"
+	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethutil"
 	"math"
 	"math/big"
 )
 
+var vmlogger = ethlog.NewLogger("VM")
+
 var (
 	GasStep    = big.NewInt(1)
 	GasSha     = big.NewInt(20)
@@ -72,7 +75,7 @@ func (self *Vm) Printf(format string, v ...interface{}) *Vm {
 
 func (self *Vm) Endl() *Vm {
 	if self.Verbose {
-		ethutil.Config.Log.Infoln(self.logStr)
+		vmlogger.Infoln(self.logStr)
 		self.logStr = ""
 	}
 
@@ -93,28 +96,27 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
 		if r := recover(); r != nil {
 			ret = closure.Return(nil)
 			err = fmt.Errorf("%v", r)
-			fmt.Println("vm err", err)
+			vmlogger.Errorln("vm err", err)
 		}
 	}()
 
-	ethutil.Config.Log.Debugf("[VM] (~) %x gas: %v (d) %x\n", closure.object.Address(), closure.Gas, closure.Args)
+	vmlogger.Debugf("(~) %x gas: %v (d) %x\n", closure.object.Address(), closure.Gas, closure.Args)
 
-	// Memory for the current closure
-	mem := &Memory{}
-	// New stack (should this be shared?)
-	stack := NewStack()
-	require := func(m int) {
-		if stack.Len() < m {
-			isRequireError = true
-			panic(fmt.Sprintf("stack = %d, req = %d", stack.Len(), m))
+	var (
+		op OpCode
+
+		mem      = &Memory{}
+		stack    = NewStack()
+		pc       = big.NewInt(0)
+		step     = 0
+		prevStep = 0
+		require  = func(m int) {
+			if stack.Len() < m {
+				isRequireError = true
+				panic(fmt.Sprintf("%04v (%v) stack err size = %d, required = %d", pc, op, stack.Len(), m))
+			}
 		}
-	}
-
-	// Instruction pointer
-	pc := big.NewInt(0)
-	// Current step count
-	step := 0
-	prevStep := 0
+	)
 
 	for {
 		prevStep = step
@@ -125,7 +127,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
 		// Get the memory location of pc
 		val := closure.Get(pc)
 		// Get the opcode (it must be an opcode!)
-		op := OpCode(val.Uint())
+		op = OpCode(val.Uint())
 
 		gas := new(big.Int)
 		addStepGasUsage := func(amount *big.Int) {
@@ -325,21 +327,21 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
 			stack.Push(base)
 		case LT:
 			require(2)
-			y, x := stack.Popn()
-			vm.Printf(" %v < %v", x, y)
+			x, y := stack.Popn()
+			vm.Printf(" %v < %v", y, x)
 			// x < y
-			if x.Cmp(y) < 0 {
+			if y.Cmp(x) < 0 {
 				stack.Push(ethutil.BigTrue)
 			} else {
 				stack.Push(ethutil.BigFalse)
 			}
 		case GT:
 			require(2)
-			y, x := stack.Popn()
-			vm.Printf(" %v > %v", x, y)
+			x, y := stack.Popn()
+			vm.Printf(" %v > %v", y, x)
 
 			// x > y
-			if x.Cmp(y) > 0 {
+			if y.Cmp(x) > 0 {
 				stack.Push(ethutil.BigTrue)
 			} else {
 				stack.Push(ethutil.BigFalse)
@@ -358,10 +360,10 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
 		case NOT:
 			require(1)
 			x := stack.Pop()
-			if x.Cmp(ethutil.BigFalse) == 0 {
-				stack.Push(ethutil.BigTrue)
-			} else {
+			if x.Cmp(ethutil.BigFalse) > 0 {
 				stack.Push(ethutil.BigFalse)
+			} else {
+				stack.Push(ethutil.BigTrue)
 			}
 
 			// 0x10 range
@@ -433,9 +435,28 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
 
 			vm.Printf(" => %d", l)
 		case CALLDATACOPY:
-			panic("not implemented")
+			var (
+				size = int64(len(closure.Args))
+				mOff = stack.Pop().Int64()
+				cOff = stack.Pop().Int64()
+				l    = stack.Pop().Int64()
+			)
+
+			if cOff > size {
+				cOff = 0
+				l = 0
+			} else if cOff+l > size {
+				l = 0
+			}
+
+			code := closure.Args[cOff : cOff+l]
+
+			mem.Set(mOff, l, code)
 		case CODESIZE:
-			stack.Push(big.NewInt(int64(len(closure.Script))))
+			l := big.NewInt(int64(len(closure.Script)))
+			stack.Push(l)
+
+			vm.Printf(" => %d", l)
 		case CODECOPY:
 			var (
 				size = int64(len(closure.Script))
@@ -501,7 +522,10 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
 		case MLOAD:
 			require(1)
 			offset := stack.Pop()
-			stack.Push(ethutil.BigD(mem.Get(offset.Int64(), 32)))
+			val := ethutil.BigD(mem.Get(offset.Int64(), 32))
+			stack.Push(val)
+
+			vm.Printf(" => 0x%x", val.Bytes())
 		case MSTORE: // Store the value at stack top-1 in to memory at location stack top
 			require(2)
 			// Pop value of the stack
@@ -520,17 +544,14 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
 			require(1)
 			loc := stack.Pop()
 			val := closure.GetMem(loc)
+
 			stack.Push(val.BigInt())
 
-			vm.Printf(" {} 0x%x", val)
+			vm.Printf(" {0x%x} 0x%x", loc.Bytes(), val.Bytes())
 		case SSTORE:
 			require(2)
 			val, loc := stack.Popn()
-
-			// FIXME This should be handled in the Trie it self
-			if val.Cmp(big.NewInt(0)) != 0 {
-				closure.SetStorage(loc, ethutil.NewValue(val))
-			}
+			closure.SetStorage(loc, ethutil.NewValue(val))
 
 			// Add the change to manifest
 			vm.state.manifest.AddStorageChange(closure.Object(), loc.Bytes(), val)
@@ -574,14 +595,18 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
 
 			// Generate a new address
 			addr := ethutil.CreateAddress(closure.caller.Address(), closure.caller.N())
+
+			vm.Printf(" (*) %x", addr).Endl()
+
 			// Create a new contract
-			contract := NewContract(addr, value, []byte(""))
+			contract := vm.state.NewStateObject(addr)
+			contract.Amount = value
+
 			// Set the init script
-			contract.initScript = mem.Get(offset.Int64(), size.Int64())
+			contract.initScript = ethutil.BigD(mem.Get(offset.Int64(), size.Int64())).Bytes()
 			// Transfer all remaining gas to the new
 			// contract so it may run the init script
 			gas := new(big.Int).Set(closure.Gas)
-			//closure.UseGas(gas)
 
 			// Create the closure
 			c := NewClosure(closure.caller,
@@ -592,6 +617,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
 				closure.Price)
 			// Call the closure and set the return value as
 			// main script.
+			var err error
 			c.Script, gas, err = c.Call(vm, nil, hook)
 
 			if err != nil {
@@ -619,7 +645,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
 			args := mem.Get(inOffset.Int64(), inSize.Int64())
 
 			if closure.object.Amount.Cmp(value) < 0 {
-				ethutil.Config.Log.Debugf("Insufficient funds to transfer value. Req %v, has %v", value, closure.object.Amount)
+				vmlogger.Debugf("Insufficient funds to transfer value. Req %v, has %v", value, closure.object.Amount)
 
 				stack.Push(ethutil.BigFalse)
 			} else {
@@ -638,7 +664,7 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
 				if err != nil {
 					stack.Push(ethutil.BigFalse)
 
-					ethutil.Config.Log.Debugf("Closure execution failed. %v\n", err)
+					vmlogger.Debugf("Closure execution failed. %v\n", err)
 
 					vm.err = err
 					vm.state.Set(snapshot)
@@ -669,11 +695,11 @@ func (vm *Vm) RunClosure(closure *Closure, hook DebugHook) (ret []byte, err erro
 
 			fallthrough
 		case STOP: // Stop the closure
-			vm.Printf(" (g) %v", closure.Gas).Endl()
+			vm.Endl()
 
 			return closure.Return(nil), nil
 		default:
-			ethutil.Config.Log.Debugf("Invalid opcode %x\n", op)
+			vmlogger.Debugf("Invalid opcode %x\n", op)
 
 			return closure.Return(nil), fmt.Errorf("Invalid opcode %x", op)
 		}
diff --git a/ethereum.go b/ethereum.go
index a6cb78b1f..a3df23e92 100644
--- a/ethereum.go
+++ b/ethereum.go
@@ -5,11 +5,11 @@ import (
 	"fmt"
 	"github.com/ethereum/eth-go/ethchain"
 	"github.com/ethereum/eth-go/ethdb"
+	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethrpc"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/ethereum/eth-go/ethwire"
 	"io/ioutil"
-	"log"
 	"math/rand"
 	"net"
 	"net/http"
@@ -20,6 +20,8 @@ import (
 	"time"
 )
 
+var ethlogger = ethlog.NewLogger("SERV")
+
 func eachPeer(peers *list.List, callback func(*Peer, *list.Element)) {
 	// Loop thru the peers and close them (if we had them)
 	for e := peers.Front(); e != nil; e = e.Next() {
@@ -85,7 +87,7 @@ func New(caps Caps, usePnp bool) (*Ethereum, error) {
 	if usePnp {
 		nat, err = Discover()
 		if err != nil {
-			ethutil.Config.Log.Debugln("UPnP failed", err)
+			ethlogger.Debugln("UPnP failed", err)
 		}
 	}
 
@@ -163,7 +165,7 @@ func (s *Ethereum) AddPeer(conn net.Conn) {
 		if s.peers.Len() < s.MaxPeers {
 			peer.Start()
 		} else {
-			ethutil.Config.Log.Debugf("[SERV] Max connected peers reached. Not adding incoming peer.")
+			ethlogger.Debugf("Max connected peers reached. Not adding incoming peer.")
 		}
 	}
 }
@@ -223,7 +225,7 @@ func (s *Ethereum) ConnectToPeer(addr string) error {
 
 			if phost == chost {
 				alreadyConnected = true
-				//ethutil.Config.Log.Debugf("[SERV] Peer %s already added.\n", chost)
+				//ethlogger.Debugf("Peer %s already added.\n", chost)
 				return
 			}
 		})
@@ -340,12 +342,12 @@ func (s *Ethereum) Start(seed bool) {
 	// Bind to addr and port
 	ln, err := net.Listen("tcp", ":"+s.Port)
 	if err != nil {
-		log.Println("Connection listening disabled. Acting as client")
+		ethlogger.Warnf("Port %s in use. Connection listening disabled. Acting as client", s.Port)
 		s.listening = false
 	} else {
 		s.listening = true
 		// Starting accepting connections
-		ethutil.Config.Log.Infoln("Ready and accepting connections")
+		ethlogger.Infoln("Ready and accepting connections")
 		// Start the peer handler
 		go s.peerHandler(ln)
 	}
@@ -360,10 +362,11 @@ func (s *Ethereum) Start(seed bool) {
 	if seed {
 		s.Seed()
 	}
+	ethlogger.Infoln("Server started")
 }
 
 func (s *Ethereum) Seed() {
-	ethutil.Config.Log.Debugln("[SERV] Retrieving seed nodes")
+	ethlogger.Debugln("Retrieving seed nodes")
 
 	// Eth-Go Bootstrapping
 	ips, er := net.LookupIP("seed.bysh.me")
@@ -371,7 +374,7 @@ func (s *Ethereum) Seed() {
 		peers := []string{}
 		for _, ip := range ips {
 			node := fmt.Sprintf("%s:%d", ip.String(), 30303)
-			ethutil.Config.Log.Debugln("[SERV] Found DNS Go Peer:", node)
+			ethlogger.Debugln("Found DNS Go Peer:", node)
 			peers = append(peers, node)
 		}
 		s.ProcessPeerList(peers)
@@ -391,11 +394,11 @@ func (s *Ethereum) Seed() {
 				for _, a := range addr {
 					// Build string out of SRV port and Resolved IP
 					peer := net.JoinHostPort(a, port)
-					ethutil.Config.Log.Debugln("[SERV] Found DNS Bootstrap Peer:", peer)
+					ethlogger.Debugln("Found DNS Bootstrap Peer:", peer)
 					peers = append(peers, peer)
 				}
 			} else {
-				ethutil.Config.Log.Debugln("[SERV} Couldn't resolve :", target)
+				ethlogger.Debugln("Couldn't resolve :", target)
 			}
 		}
 		// Connect to Peer list
@@ -404,13 +407,13 @@ func (s *Ethereum) Seed() {
 		// Fallback to servers.poc3.txt
 		resp, err := http.Get("http://www.ethereum.org/servers.poc3.txt")
 		if err != nil {
-			log.Println("Fetching seed failed:", err)
+			ethlogger.Warnln("Fetching seed failed:", err)
 			return
 		}
 		defer resp.Body.Close()
 		body, err := ioutil.ReadAll(resp.Body)
 		if err != nil {
-			log.Println("Reading seed failed:", err)
+			ethlogger.Warnln("Reading seed failed:", err)
 			return
 		}
 
@@ -422,7 +425,7 @@ func (s *Ethereum) peerHandler(listener net.Listener) {
 	for {
 		conn, err := listener.Accept()
 		if err != nil {
-			ethutil.Config.Log.Debugln(err)
+			ethlogger.Debugln(err)
 
 			continue
 		}
@@ -447,6 +450,7 @@ func (s *Ethereum) Stop() {
 	s.txPool.Stop()
 	s.stateManager.Stop()
 
+	ethlogger.Infoln("Server stopped")
 	close(s.shutdownChan)
 }
 
@@ -468,13 +472,13 @@ out:
 			var err error
 			_, err = s.nat.AddPortMapping("TCP", int(lport), int(lport), "eth listen port", 20*60)
 			if err != nil {
-				ethutil.Config.Log.Debugln("can't add UPnP port mapping:", err)
+				ethlogger.Debugln("can't add UPnP port mapping:", err)
 				break out
 			}
 			if first && err == nil {
 				_, err = s.nat.GetExternalAddress()
 				if err != nil {
-					ethutil.Config.Log.Debugln("UPnP can't get external address:", err)
+					ethlogger.Debugln("UPnP can't get external address:", err)
 					continue out
 				}
 				first = false
@@ -488,8 +492,8 @@ out:
 	timer.Stop()
 
 	if err := s.nat.DeletePortMapping("TCP", int(lport), int(lport)); err != nil {
-		ethutil.Config.Log.Debugln("unable to remove UPnP port mapping:", err)
+		ethlogger.Debugln("unable to remove UPnP port mapping:", err)
 	} else {
-		ethutil.Config.Log.Debugln("succesfully disestablished UPnP port mapping")
+		ethlogger.Debugln("succesfully disestablished UPnP port mapping")
 	}
 }
diff --git a/ethlog/README.md b/ethlog/README.md
new file mode 100644
index 000000000..d9b69e106
--- /dev/null
+++ b/ethlog/README.md
@@ -0,0 +1,62 @@
+## Features
+
+- packages use tagged logger sending log messages to shared (process-wide) logging engine
+- log writers (interface ethlog.LogSystem) can be added to the logging engine by wrappers/guis/clients
+- shared logging engine dispatching to multiple log systems
+- log level can be set separately per log system
+- async logging thread: logging IO does not block main thread 
+- log messages are synchronously stringified to avoid incorrectly logging of changed states 
+- log level enum: ethlog.LogLevel:   Silence, ErrorLevel, WarnLevel, InfoLevel, DebugLevel, DebugDetailLevel
+
+## Usage
+
+In an ethereum component package:
+
+    import "github.com/ethereum/eth-go/ethlog"
+
+    // package-wide logger using tag
+    var logger = ethlog.NewLogger("TAG")
+
+Logger provides named Printf and Println style methods for all loglevels
+
+    logger.Infoln("this is info") # > [TAG] This is info
+    logger.Infof("this %v is info", object) # > [TAG] This object is info
+
+Ethereum wrappers should register log systems conforming to ethlog.LogSystem
+
+    import "github.com/ethereum/eth-go/ethlog"
+    
+    type CustomLogWriter struct {
+      logLevel ethlog.LogLevel
+    }
+
+    func (t *TestLogSystem) SetLogLevel(i LogLevel) {
+      t.level = i
+    }
+
+    func (t *TestLogSystem) GetLogLevel() LogLevel {
+      return t.level
+    }
+
+    func (c *CustomLogWriter) Printf(format string, v...interface{}) {
+      //....
+    }
+
+    func (c *CustomLogWriter) Println(v...interface{}) {
+      //....
+    }
+
+    ethlog.AddLogWriter(&CustomLogWriter{})
+
+ethlog also provides constructors for that wrap io.Writers into a standard logger with a settable level:
+
+    filename := "test.log"
+    file, _ := os.OpenFile(filename, os.O_RDWR|os.O_CREATE, os.ModePerm)
+    fileLogSystem := NewStdLogSystem(file, 0, WarnLevel)
+    AddLogSystem(fileLogSystem)
+    stdOutLogSystem := NewStdLogSystem(os.Stdout, 0, WarnLevel)
+    AddLogSystem(stdOutLogSystem)
+
+
+
+
diff --git a/ethlog/loggers.go b/ethlog/loggers.go
new file mode 100644
index 000000000..9ebe59096
--- /dev/null
+++ b/ethlog/loggers.go
@@ -0,0 +1,188 @@
+package ethlog
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"sync"
+)
+
+type LogSystem interface {
+	GetLogLevel() LogLevel
+	SetLogLevel(i LogLevel)
+	Println(v ...interface{})
+	Printf(format string, v ...interface{})
+}
+
+type logMessage struct {
+	LogLevel LogLevel
+	format   bool
+	msg      string
+}
+
+func newPrintlnLogMessage(level LogLevel, tag string, v ...interface{}) *logMessage {
+	return &logMessage{level, false, fmt.Sprintf("[%s] %s", tag, fmt.Sprint(v...))}
+}
+
+func newPrintfLogMessage(level LogLevel, tag string, format string, v ...interface{}) *logMessage {
+	return &logMessage{level, true, fmt.Sprintf("[%s] %s", tag, fmt.Sprintf(format, v...))}
+}
+
+func (msg *logMessage) send(logger LogSystem) {
+	if msg.format {
+		logger.Printf(msg.msg)
+	} else {
+		logger.Println(msg.msg)
+	}
+}
+
+var logMessages chan (*logMessage)
+var logSystems []LogSystem
+var drained = true
+
+type LogLevel uint8
+
+const (
+	Silence LogLevel = iota
+	ErrorLevel
+	WarnLevel
+	InfoLevel
+	DebugLevel
+	DebugDetailLevel
+)
+
+// log messages are dispatched to log writers
+func start() {
+	for {
+		select {
+		case msg := <-logMessages:
+			for _, logSystem := range logSystems {
+				if logSystem.GetLogLevel() >= msg.LogLevel {
+					msg.send(logSystem)
+				}
+			}
+		default:
+			drained = true
+		}
+	}
+}
+
+// waits until log messages are drained (dispatched to log writers)
+func Flush() {
+	for !drained {
+	}
+}
+
+type Logger struct {
+	tag string
+}
+
+func NewLogger(tag string) *Logger {
+	return &Logger{tag}
+}
+
+func AddLogSystem(logSystem LogSystem) {
+	var mutex = &sync.Mutex{}
+	mutex.Lock()
+	defer mutex.Unlock()
+	if logSystems == nil {
+		logMessages = make(chan *logMessage)
+		go start()
+	}
+	logSystems = append(logSystems, logSystem)
+}
+
+func (logger *Logger) sendln(level LogLevel, v ...interface{}) {
+	if logMessages != nil {
+		msg := newPrintlnLogMessage(level, logger.tag, v...)
+		drained = false
+		logMessages <- msg
+	}
+}
+
+func (logger *Logger) sendf(level LogLevel, format string, v ...interface{}) {
+	if logMessages != nil {
+		msg := newPrintfLogMessage(level, logger.tag, format, v...)
+		drained = false
+		logMessages <- msg
+	}
+}
+
+func (logger *Logger) Errorln(v ...interface{}) {
+	logger.sendln(ErrorLevel, v...)
+}
+
+func (logger *Logger) Warnln(v ...interface{}) {
+	logger.sendln(WarnLevel, v...)
+}
+
+func (logger *Logger) Infoln(v ...interface{}) {
+	logger.sendln(InfoLevel, v...)
+}
+
+func (logger *Logger) Debugln(v ...interface{}) {
+	logger.sendln(DebugLevel, v...)
+}
+
+func (logger *Logger) DebugDetailln(v ...interface{}) {
+	logger.sendln(DebugDetailLevel, v...)
+}
+
+func (logger *Logger) Errorf(format string, v ...interface{}) {
+	logger.sendf(ErrorLevel, format, v...)
+}
+
+func (logger *Logger) Warnf(format string, v ...interface{}) {
+	logger.sendf(WarnLevel, format, v...)
+}
+
+func (logger *Logger) Infof(format string, v ...interface{}) {
+	logger.sendf(InfoLevel, format, v...)
+}
+
+func (logger *Logger) Debugf(format string, v ...interface{}) {
+	logger.sendf(DebugLevel, format, v...)
+}
+
+func (logger *Logger) DebugDetailf(format string, v ...interface{}) {
+	logger.sendf(DebugDetailLevel, format, v...)
+}
+
+func (logger *Logger) Fatalln(v ...interface{}) {
+	logger.sendln(ErrorLevel, v...)
+	Flush()
+	os.Exit(0)
+}
+
+func (logger *Logger) Fatalf(format string, v ...interface{}) {
+	logger.sendf(ErrorLevel, format, v...)
+	Flush()
+	os.Exit(0)
+}
+
+type StdLogSystem struct {
+	logger *log.Logger
+	level  LogLevel
+}
+
+func (t *StdLogSystem) Println(v ...interface{}) {
+	t.logger.Println(v...)
+}
+
+func (t *StdLogSystem) Printf(format string, v ...interface{}) {
+	t.logger.Printf(format, v...)
+}
+
+func (t *StdLogSystem) SetLogLevel(i LogLevel) {
+	t.level = i
+}
+
+func (t *StdLogSystem) GetLogLevel() LogLevel {
+	return t.level
+}
+
+func NewStdLogSystem(writer io.Writer, flags int, level LogLevel) *StdLogSystem {
+	logger := log.New(writer, "", flags)
+	return &StdLogSystem{logger, level}
+}
diff --git a/ethlog/loggers_test.go b/ethlog/loggers_test.go
new file mode 100644
index 000000000..89f416681
--- /dev/null
+++ b/ethlog/loggers_test.go
@@ -0,0 +1,109 @@
+package ethlog
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"testing"
+)
+
+type TestLogSystem struct {
+	Output string
+	level  LogLevel
+}
+
+func (t *TestLogSystem) Println(v ...interface{}) {
+	t.Output += fmt.Sprintln(v...)
+}
+
+func (t *TestLogSystem) Printf(format string, v ...interface{}) {
+	t.Output += fmt.Sprintf(format, v...)
+}
+
+func (t *TestLogSystem) SetLogLevel(i LogLevel) {
+	t.level = i
+}
+
+func (t *TestLogSystem) GetLogLevel() LogLevel {
+	return t.level
+}
+
+func quote(s string) string {
+	return fmt.Sprintf("'%s'", s)
+}
+
+func TestLoggerPrintln(t *testing.T) {
+	logger := NewLogger("TEST")
+	testLogSystem := &TestLogSystem{level: WarnLevel}
+	AddLogSystem(testLogSystem)
+	logger.Errorln("error")
+	logger.Warnln("warn")
+	logger.Infoln("info")
+	logger.Debugln("debug")
+	Flush()
+	output := testLogSystem.Output
+	fmt.Println(quote(output))
+	if output != "[TEST] error\n[TEST] warn\n" {
+		t.Error("Expected logger output '[TEST] error\\n[TEST] warn\\n', got ", quote(testLogSystem.Output))
+	}
+}
+
+func TestLoggerPrintf(t *testing.T) {
+	logger := NewLogger("TEST")
+	testLogSystem := &TestLogSystem{level: WarnLevel}
+	AddLogSystem(testLogSystem)
+	logger.Errorf("error to %v\n", *testLogSystem)
+	logger.Warnf("warn")
+	logger.Infof("info")
+	logger.Debugf("debug")
+	Flush()
+	output := testLogSystem.Output
+	fmt.Println(quote(output))
+	if output != "[TEST] error to { 2}\n[TEST] warn" {
+		t.Error("Expected logger output '[TEST] error to { 2}\\n[TEST] warn', got ", quote(testLogSystem.Output))
+	}
+}
+
+func TestMultipleLogSystems(t *testing.T) {
+	logger := NewLogger("TEST")
+	testLogSystem0 := &TestLogSystem{level: ErrorLevel}
+	testLogSystem1 := &TestLogSystem{level: WarnLevel}
+	AddLogSystem(testLogSystem0)
+	AddLogSystem(testLogSystem1)
+	logger.Errorln("error")
+	logger.Warnln("warn")
+	Flush()
+	output0 := testLogSystem0.Output
+	output1 := testLogSystem1.Output
+	if output0 != "[TEST] error\n" {
+		t.Error("Expected logger 0 output '[TEST] error\\n', got ", quote(testLogSystem0.Output))
+	}
+	if output1 != "[TEST] error\n[TEST] warn\n" {
+		t.Error("Expected logger 1 output '[TEST] error\\n[TEST] warn\\n', got ", quote(testLogSystem1.Output))
+	}
+}
+
+func TestFileLogSystem(t *testing.T) {
+	logger := NewLogger("TEST")
+	filename := "test.log"
+	file, _ := os.OpenFile(filename, os.O_RDWR|os.O_CREATE, os.ModePerm)
+	testLogSystem := NewStdLogSystem(file, 0, WarnLevel)
+	AddLogSystem(testLogSystem)
+	logger.Errorf("error to %s\n", filename)
+	logger.Warnln("warn")
+	Flush()
+	contents, _ := ioutil.ReadFile(filename)
+	output := string(contents)
+	fmt.Println(quote(output))
+	if output != "[TEST] error to test.log\n[TEST] warn\n" {
+		t.Error("Expected contents of file 'test.log': '[TEST] error to test.log\\n[TEST] warn\\n', got ", quote(output))
+	} else {
+		os.Remove(filename)
+	}
+}
+
+func TestNoLogSystem(t *testing.T) {
+	logger := NewLogger("TEST")
+	logger.Warnln("warn")
+	Flush()
+}
diff --git a/ethminer/miner.go b/ethminer/miner.go
index 4343b4333..66388723e 100644
--- a/ethminer/miner.go
+++ b/ethminer/miner.go
@@ -3,11 +3,14 @@ package ethminer
 import (
 	"bytes"
 	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/ethereum/eth-go/ethwire"
 	"sort"
 )
 
+var logger = ethlog.NewLogger("MINER")
+
 type Miner struct {
 	pow         ethchain.PoW
 	ethereum    ethchain.EthManager
@@ -54,23 +57,28 @@ func NewDefaultMiner(coinbase []byte, ethereum ethchain.EthManager) Miner {
 
 	return miner
 }
+
 func (miner *Miner) Start() {
 	// Prepare inital block
 	//miner.ethereum.StateManager().Prepare(miner.block.State(), miner.block.State())
 	go miner.listener()
+	logger.Infoln("Started")
 }
+
 func (miner *Miner) listener() {
 out:
 	for {
 		select {
 		case <-miner.quitChan:
+			logger.Infoln("Stopped")
 			break out
 		case chanMessage := <-miner.reactChan:
+
 			if block, ok := chanMessage.Resource.(*ethchain.Block); ok {
-				//ethutil.Config.Log.Infoln("[MINER] Got new block via Reactor")
+				//logger.Infoln("Got new block via Reactor")
 				if bytes.Compare(miner.ethereum.BlockChain().CurrentBlock.Hash(), block.Hash()) == 0 {
 					// TODO: Perhaps continue mining to get some uncle rewards
-					//ethutil.Config.Log.Infoln("[MINER] New top block found resetting state")
+					//logger.Infoln("New top block found resetting state")
 
 					// Filter out which Transactions we have that were not in this block
 					var newtxs []*ethchain.Transaction
@@ -92,7 +100,7 @@ out:
 
 				} else {
 					if bytes.Compare(block.PrevHash, miner.ethereum.BlockChain().CurrentBlock.PrevHash) == 0 {
-						ethutil.Config.Log.Infoln("[MINER] Adding uncle block")
+						logger.Infoln("Adding uncle block")
 						miner.uncles = append(miner.uncles, block)
 					}
 				}
@@ -120,8 +128,9 @@ out:
 }
 
 func (self *Miner) Stop() {
-	self.powQuitChan <- ethutil.React{}
+	logger.Infoln("Stopping...")
 	self.quitChan <- true
+	self.powQuitChan <- ethutil.React{}
 }
 
 func (self *Miner) mineNewBlock() {
@@ -137,14 +146,14 @@ func (self *Miner) mineNewBlock() {
 	// Sort the transactions by nonce in case of odd network propagation
 	sort.Sort(ethchain.TxByNonce{self.txs})
 
-	// Accumulate all valid transaction and apply them to the new state
+	// Accumulate all valid transactions and apply them to the new state
 	// Error may be ignored. It's not important during mining
 	parent := self.ethereum.BlockChain().GetBlock(self.block.PrevHash)
 	coinbase := self.block.State().GetOrNewStateObject(self.block.Coinbase)
 	coinbase.SetGasPool(self.block.CalcGasLimit(parent))
 	receipts, txs, unhandledTxs, err := stateManager.ProcessTransactions(coinbase, self.block.State(), self.block, self.block, self.txs)
 	if err != nil {
-		ethutil.Config.Log.Debugln("[MINER]", err)
+		logger.Debugln(err)
 	}
 	self.txs = append(txs, unhandledTxs...)
 
@@ -156,18 +165,18 @@ func (self *Miner) mineNewBlock() {
 
 	self.block.State().Update()
 
-	ethutil.Config.Log.Infoln("[MINER] Mining on block. Includes", len(self.txs), "transactions")
+	logger.Infof("Mining on block. Includes %v transactions", len(self.txs))
 
 	// Find a valid nonce
 	self.block.Nonce = self.pow.Search(self.block, self.powQuitChan)
 	if self.block.Nonce != nil {
 		err := self.ethereum.StateManager().Process(self.block, false)
 		if err != nil {
-			ethutil.Config.Log.Infoln(err)
+			logger.Infoln(err)
 		} else {
 			self.ethereum.Broadcast(ethwire.MsgBlockTy, []interface{}{self.block.Value().Val})
-			ethutil.Config.Log.Infof("[MINER] 🔨  Mined block %x\n", self.block.Hash())
-			ethutil.Config.Log.Infoln(self.block)
+			logger.Infof("🔨  Mined block %x\n", self.block.Hash())
+			logger.Infoln(self.block)
 			// Gather the new batch of transactions currently in the tx pool
 			self.txs = self.ethereum.TxPool().CurrentTransactions()
 		}
diff --git a/ethpub/pub.go b/ethpub/pub.go
index b475453af..1bc9e0ce7 100644
--- a/ethpub/pub.go
+++ b/ethpub/pub.go
@@ -1,14 +1,19 @@
 package ethpub
 
 import (
+	"bytes"
 	"encoding/hex"
+	"encoding/json"
 	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethutil"
 	"math/big"
 	"strings"
 	"sync/atomic"
 )
 
+var logger = ethlog.NewLogger("PUB")
+
 type PEthereum struct {
 	manager      ethchain.EthManager
 	stateManager *ethchain.StateManager
@@ -81,6 +86,36 @@ func (lib *PEthereum) GetCoinBase() string {
 	return lib.SecretToAddress(hex.EncodeToString(key))
 }
 
+func (lib *PEthereum) GetTransactionsFor(address string, asJson bool) interface{} {
+	sBlk := lib.manager.BlockChain().LastBlockHash
+	blk := lib.manager.BlockChain().GetBlock(sBlk)
+	addr := []byte(ethutil.FromHex(address))
+
+	var txs []*PTx
+
+	for ; blk != nil; blk = lib.manager.BlockChain().GetBlock(sBlk) {
+		sBlk = blk.PrevHash
+
+		// Loop through all transactions to see if we missed any while being offline
+		for _, tx := range blk.Transactions() {
+			if bytes.Compare(tx.Sender(), addr) == 0 || bytes.Compare(tx.Recipient, addr) == 0 {
+				ptx := NewPTx(tx)
+				//TODO: somehow move this to NewPTx
+				ptx.Confirmations = int(lib.manager.BlockChain().LastBlockNumber - blk.BlockInfo().Number)
+				txs = append(txs, ptx)
+			}
+		}
+	}
+	if asJson {
+		txJson, err := json.Marshal(txs)
+		if err != nil {
+			return nil
+		}
+		return string(txJson)
+	}
+	return txs
+}
+
 func (lib *PEthereum) GetStorage(address, storageAddress string) string {
 	return lib.GetStateObject(address).GetStorage(storageAddress)
 }
@@ -123,7 +158,6 @@ func GetAddressFromNameReg(stateManager *ethchain.StateManager, name string) []b
 
 	return nil
 }
-
 func (lib *PEthereum) createTx(key, recipient, valueStr, gasStr, gasPriceStr, scriptStr string) (*PReceipt, error) {
 	var hash []byte
 	var contractCreation bool
@@ -142,7 +176,7 @@ func (lib *PEthereum) createTx(key, recipient, valueStr, gasStr, gasPriceStr, sc
 	var keyPair *ethutil.KeyPair
 	var err error
 	if key[0:2] == "0x" {
-		keyPair, err = ethutil.NewKeyPairFromSec([]byte(ethutil.FromHex(key[0:2])))
+		keyPair, err = ethutil.NewKeyPairFromSec([]byte(ethutil.FromHex(key[2:])))
 	} else {
 		keyPair, err = ethutil.NewKeyPairFromSec([]byte(ethutil.FromHex(key)))
 	}
@@ -191,7 +225,7 @@ func (lib *PEthereum) createTx(key, recipient, valueStr, gasStr, gasPriceStr, sc
 	lib.txPool.QueueTransaction(tx)
 
 	if contractCreation {
-		ethutil.Config.Log.Infof("Contract addr %x", tx.CreationAddress())
+		logger.Infof("Contract addr %x", tx.CreationAddress())
 	}
 
 	return NewPReciept(contractCreation, tx.CreationAddress(), tx.Hash(), keyPair.Address()), nil
diff --git a/ethpub/types.go b/ethpub/types.go
index 31b92f6ed..0ced68ad1 100644
--- a/ethpub/types.go
+++ b/ethpub/types.go
@@ -99,6 +99,7 @@ type PTx struct {
 	Data            string `json:"data"`
 	Contract        bool   `json:"isContract"`
 	CreatesContract bool   `json:"createsContract"`
+	Confirmations   int    `json:"confirmations"`
 }
 
 func NewPTx(tx *ethchain.Transaction) *PTx {
@@ -244,6 +245,14 @@ func (c *PStateObject) Script() string {
 	return ""
 }
 
+func (c *PStateObject) HexScript() string {
+	if c.object != nil {
+		return ethutil.Hex(c.object.Script())
+	}
+
+	return ""
+}
+
 type PStorageState struct {
 	StateAddress string
 	Address      string
diff --git a/ethrpc/packages.go b/ethrpc/packages.go
index 1c4fb99f6..710275780 100644
--- a/ethrpc/packages.go
+++ b/ethrpc/packages.go
@@ -6,6 +6,7 @@ import (
 	"github.com/ethereum/eth-go/ethpub"
 	"github.com/ethereum/eth-go/ethutil"
 	"math/big"
+	"strings"
 )
 
 type EthereumApi struct {
@@ -174,9 +175,16 @@ func (p *EthereumApi) GetStorageAt(args *GetStorageArgs, reply *string) error {
 		return err
 	}
 	state := p.ethp.GetStateObject(args.Address)
-	// Convert the incoming string (which is a bigint) into hex
-	i, _ := new(big.Int).SetString(args.Key, 10)
-	hx := ethutil.Hex(i.Bytes())
+
+	var hx string
+	if strings.Index(args.Key, "0x") == 0 {
+		hx = string([]byte(args.Key)[2:])
+	} else {
+		// Convert the incoming string (which is a bigint) into hex
+		i, _ := new(big.Int).SetString(args.Key, 10)
+		hx = ethutil.Hex(i.Bytes())
+	}
+	logger.Debugf("GetStorageAt(%s, %s)\n", args.Address, hx)
 	value := state.GetStorage(hx)
 	*reply = NewSuccessRes(GetStorageAtRes{Address: args.Address, Key: args.Key, Value: value})
 	return nil
diff --git a/ethrpc/server.go b/ethrpc/server.go
index 3960e641c..d9d6f695b 100644
--- a/ethrpc/server.go
+++ b/ethrpc/server.go
@@ -2,13 +2,15 @@ package ethrpc
 
 import (
 	"fmt"
+	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethpub"
-	"github.com/ethereum/eth-go/ethutil"
 	"net"
 	"net/rpc"
 	"net/rpc/jsonrpc"
 )
 
+var logger = ethlog.NewLogger("JSON")
+
 type JsonRpcServer struct {
 	quit     chan bool
 	listener net.Listener
@@ -25,7 +27,7 @@ out:
 		}
 	}
 
-	ethutil.Config.Log.Infoln("[JSON] Shutdown JSON-RPC server")
+	logger.Infoln("Shutdown JSON-RPC server")
 }
 
 func (s *JsonRpcServer) Stop() {
@@ -33,7 +35,7 @@ func (s *JsonRpcServer) Stop() {
 }
 
 func (s *JsonRpcServer) Start() {
-	ethutil.Config.Log.Infoln("[JSON] Starting JSON-RPC server")
+	logger.Infoln("Starting JSON-RPC server")
 	go s.exitHandler()
 	rpc.Register(&EthereumApi{ethp: s.ethp})
 	rpc.HandleHTTP()
@@ -41,10 +43,10 @@ func (s *JsonRpcServer) Start() {
 	for {
 		conn, err := s.listener.Accept()
 		if err != nil {
-			ethutil.Config.Log.Infoln("[JSON] Error starting JSON-RPC:", err)
+			logger.Infoln("Error starting JSON-RPC:", err)
 			break
 		}
-		ethutil.Config.Log.Debugln("[JSON] Incoming request.")
+		logger.Debugln("Incoming request.")
 		go jsonrpc.ServeConn(conn)
 	}
 }
diff --git a/ethutil/config.go b/ethutil/config.go
index a573e108b..aa4ae9c3e 100644
--- a/ethutil/config.go
+++ b/ethutil/config.go
@@ -4,10 +4,7 @@ import (
 	"flag"
 	"fmt"
 	"github.com/rakyll/globalconf"
-	"log"
 	"os"
-	"os/user"
-	"path"
 	"runtime"
 )
 
@@ -15,7 +12,6 @@ import (
 type config struct {
 	Db Database
 
-	Log          *Logger
 	ExecPath     string
 	Debug        bool
 	Ver          string
@@ -26,62 +22,31 @@ type config struct {
 	conf *globalconf.GlobalConf
 }
 
-const defaultConf = `
-id = ""
-port = 30303
-upnp = true
-maxpeer = 10
-rpc = false
-rpcport = 8080
-`
-
 var Config *config
 
-func ApplicationFolder(base string) string {
-	usr, _ := user.Current()
-	p := path.Join(usr.HomeDir, base)
-
-	if len(base) > 0 {
-		//Check if the logging directory already exists, create it if not
-		_, err := os.Stat(p)
-		if err != nil {
-			if os.IsNotExist(err) {
-				log.Printf("Debug logging directory %s doesn't exist, creating it\n", p)
-				os.Mkdir(p, 0777)
-
-			}
-		}
-
-		iniFilePath := path.Join(p, "conf.ini")
-		_, err = os.Stat(iniFilePath)
-		if err != nil && os.IsNotExist(err) {
-			file, err := os.Create(iniFilePath)
-			if err != nil {
-				fmt.Println(err)
-			} else {
-				assetPath := path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "ethereal", "assets")
-				file.Write([]byte(defaultConf + "\nasset_path = " + assetPath))
-			}
-		}
-	}
-
-	return p
-}
-
 // Read config
 //
-// Initialize the global Config variable with default settings
-func ReadConfig(base string, logTypes LoggerType, g *globalconf.GlobalConf, id string) *config {
+// Initialize Config from Config File
+func ReadConfig(ConfigFile string, Datadir string, Identifier string, EnvPrefix string) *config {
 	if Config == nil {
-		path := ApplicationFolder(base)
-
-		Config = &config{ExecPath: path, Debug: true, Ver: "0.5.14"}
-		Config.conf = g
-		Config.Identifier = id
-		Config.Log = NewLogger(logTypes, LogLevelDebug)
+		// create ConfigFile if does not exist, otherwise globalconf panic when trying to persist flags
+		_, err := os.Stat(ConfigFile)
+		if err != nil && os.IsNotExist(err) {
+			fmt.Printf("config file '%s' doesn't exist, creating it\n", ConfigFile)
+			os.Create(ConfigFile)
+		}
+		g, err := globalconf.NewWithOptions(&globalconf.Options{
+			Filename:  ConfigFile,
+			EnvPrefix: EnvPrefix,
+		})
+		if err != nil {
+			fmt.Println(err)
+		} else {
+			g.ParseAll()
+		}
+		Config = &config{ExecPath: Datadir, Debug: true, Ver: "0.5.14", conf: g, Identifier: Identifier}
 		Config.SetClientString("Ethereum(G)")
 	}
-
 	return Config
 }
 
@@ -98,137 +63,12 @@ func (c *config) SetIdentifier(id string) {
 	c.Set("id", id)
 }
 
+// provides persistence for flags
 func (c *config) Set(key, value string) {
 	f := &flag.Flag{Name: key, Value: &confValue{value}}
 	c.conf.Set("", f)
 }
 
-type LoggerType byte
-
-const (
-	LogFile = 0x1
-	LogStd  = 0x2
-)
-
-type LogSystem interface {
-	Println(v ...interface{})
-	Printf(format string, v ...interface{})
-}
-
-type Logger struct {
-	logSys   []LogSystem
-	logLevel int
-}
-
-func NewLogger(flag LoggerType, level int) *Logger {
-	var loggers []LogSystem
-
-	flags := log.LstdFlags
-
-	if flag&LogFile > 0 {
-		file, err := os.OpenFile(path.Join(Config.ExecPath, "debug.log"), os.O_RDWR|os.O_CREATE|os.O_APPEND, os.ModePerm)
-		if err != nil {
-			log.Panic("unable to create file logger", err)
-		}
-
-		log := log.New(file, "", flags)
-
-		loggers = append(loggers, log)
-	}
-	if flag&LogStd > 0 {
-		log := log.New(os.Stdout, "", flags)
-		loggers = append(loggers, log)
-	}
-
-	return &Logger{logSys: loggers, logLevel: level}
-}
-
-func (self *Logger) SetLevel(level int) {
-	self.logLevel = level
-}
-
-func (log *Logger) AddLogSystem(logger LogSystem) {
-	log.logSys = append(log.logSys, logger)
-}
-
-const (
-	LogLevelSystem = iota
-	LogLevelDebug
-	LogLevelInfo
-)
-
-func (log *Logger) Debugln(v ...interface{}) {
-	if log.logLevel != LogLevelDebug {
-		return
-	}
-
-	for _, logger := range log.logSys {
-		logger.Println(v...)
-	}
-}
-
-func (log *Logger) Debugf(format string, v ...interface{}) {
-	if log.logLevel != LogLevelDebug {
-		return
-	}
-
-	for _, logger := range log.logSys {
-		logger.Printf(format, v...)
-	}
-}
-
-func (log *Logger) Infoln(v ...interface{}) {
-	if log.logLevel > LogLevelInfo {
-		return
-	}
-
-	for _, logger := range log.logSys {
-		logger.Println(v...)
-	}
-}
-
-func (log *Logger) Infof(format string, v ...interface{}) {
-	if log.logLevel > LogLevelInfo {
-		return
-	}
-
-	for _, logger := range log.logSys {
-		logger.Printf(format, v...)
-	}
-}
-
-func (log *Logger) Fatal(v ...interface{}) {
-	if log.logLevel > LogLevelInfo {
-		return
-	}
-
-	for _, logger := range log.logSys {
-		logger.Println(v...)
-	}
-
-	os.Exit(1)
-}
-
-func (log *Logger) Println(level int, v ...interface{}) {
-	if log.logLevel > level {
-		return
-	}
-
-	for _, logger := range log.logSys {
-		logger.Println(v...)
-	}
-}
-
-func (log *Logger) Printf(level int, format string, v ...interface{}) {
-	if log.logLevel > level {
-		return
-	}
-
-	for _, logger := range log.logSys {
-		logger.Printf(format, v...)
-	}
-}
-
 type confValue struct {
 	value string
 }
diff --git a/ethutil/encoding_test.go b/ethutil/encoding_test.go
index cbfbc0eaf..10e1995c0 100644
--- a/ethutil/encoding_test.go
+++ b/ethutil/encoding_test.go
@@ -64,4 +64,4 @@ func TestCompactDecode(t *testing.T) {
 	if !CompareIntSlice(res, exp) {
 		t.Error("even terminated compact decode. Expected", exp, "got", res)
 	}
-}
\ No newline at end of file
+}
diff --git a/ethutil/script.go b/ethutil/script.go
index 94e401406..af4ca6a38 100644
--- a/ethutil/script.go
+++ b/ethutil/script.go
@@ -3,39 +3,35 @@ package ethutil
 import (
 	"fmt"
 	"github.com/obscuren/mutan"
+	"github.com/obscuren/mutan/backends"
+	"github.com/obscuren/serpent-go"
 	"strings"
 )
 
 // General compile function
-func Compile(script string) ([]byte, error) {
-	byteCode, errors := mutan.Compile(strings.NewReader(script), false)
-	if len(errors) > 0 {
-		var errs string
-		for _, er := range errors {
-			if er != nil {
-				errs += er.Error()
-			}
+func Compile(script string) (ret []byte, err error) {
+	c := strings.Split(script, "\n")[0]
+
+	if c == "#!serpent" {
+		byteCode, err := serpent.Compile(script)
+		if err != nil {
+			return nil, err
 		}
-		return nil, fmt.Errorf("%v", errs)
-	}
 
-	return byteCode, nil
-}
-
-func CompileScript(script string) ([]byte, []byte, error) {
-	// Preprocess
-	mainInput, initInput := mutan.PreParse(script)
-	// Compile main script
-	mainScript, err := Compile(mainInput)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	// Compile init script
-	initScript, err := Compile(initInput)
-	if err != nil {
-		return nil, nil, err
-	}
-
-	return mainScript, initScript, nil
+		return byteCode, nil
+	} else {
+		compiler := mutan.NewCompiler(backend.NewEthereumBackend())
+		byteCode, errors := compiler.Compile(strings.NewReader(script))
+		if len(errors) > 0 {
+			var errs string
+			for _, er := range errors {
+				if er != nil {
+					errs += er.Error()
+				}
+			}
+			return nil, fmt.Errorf("%v", errs)
+		}
+
+		return byteCode, nil
+	}
 }
diff --git a/ethutil/trie.go b/ethutil/trie.go
index 18d0a5f0a..0c1a6d260 100644
--- a/ethutil/trie.go
+++ b/ethutil/trie.go
@@ -47,7 +47,7 @@ func (cache *Cache) Put(v interface{}) interface{} {
 	value := NewValue(v)
 
 	enc := value.Encode()
-	if len(enc) >= 32 {
+	if len(enc) < 32 {
 		sha := Sha3Bin(enc)
 
 		cache.nodes[string(sha)] = NewNode(sha, value, true)
diff --git a/peer.go b/peer.go
index 2ece9b359..e50fd43f9 100644
--- a/peer.go
+++ b/peer.go
@@ -5,6 +5,7 @@ import (
 	"container/list"
 	"fmt"
 	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethutil"
 	"github.com/ethereum/eth-go/ethwire"
 	"net"
@@ -14,6 +15,8 @@ import (
 	"time"
 )
 
+var peerlogger = ethlog.NewLogger("PEER")
+
 const (
 	// The size of the output buffer for writing messages
 	outputBufferSize = 50
@@ -138,6 +141,8 @@ type Peer struct {
 	// We use this to give some kind of pingtime to a node, not very accurate, could be improved.
 	pingTime      time.Duration
 	pingStartTime time.Time
+
+	lastRequestedBlock *ethchain.Block
 }
 
 func NewPeer(conn net.Conn, ethereum *Ethereum, inbound bool) *Peer {
@@ -176,7 +181,7 @@ func NewOutboundPeer(addr string, ethereum *Ethereum, caps Caps) *Peer {
 		conn, err := net.DialTimeout("tcp", addr, 10*time.Second)
 
 		if err != nil {
-			ethutil.Config.Log.Debugln("Connection to peer failed", err)
+			peerlogger.Debugln("Connection to peer failed", err)
 			p.Stop()
 			return
 		}
@@ -245,11 +250,11 @@ func (p *Peer) writeMessage(msg *ethwire.Msg) {
 		}
 	}
 
-	ethutil.Config.Log.Println(ethutil.LogLevelSystem, "<=", msg.Type, msg.Data)
+	peerlogger.DebugDetailln("<=", msg.Type, msg.Data)
 
 	err := ethwire.WriteMessage(p.conn, msg)
 	if err != nil {
-		ethutil.Config.Log.Debugln("[PEER] Can't send message:", err)
+		peerlogger.Debugln(" Can't send message:", err)
 		// Stop the client if there was an error writing to it
 		p.Stop()
 		return
@@ -274,7 +279,7 @@ out:
 		case <-pingTimer.C:
 			timeSince := time.Since(time.Unix(p.lastPong, 0))
 			if !p.pingStartTime.IsZero() && p.lastPong != 0 && timeSince > (pingPongTimer+30*time.Second) {
-				ethutil.Config.Log.Infof("[PEER] Peer did not respond to latest pong fast enough, it took %s, disconnecting.\n", timeSince)
+				peerlogger.Infof("Peer did not respond to latest pong fast enough, it took %s, disconnecting.\n", timeSince)
 				p.Stop()
 				return
 			}
@@ -316,10 +321,10 @@ func (p *Peer) HandleInbound() {
 		// Wait for a message from the peer
 		msgs, err := ethwire.ReadMessages(p.conn)
 		if err != nil {
-			ethutil.Config.Log.Debugln(err)
+			peerlogger.Debugln(err)
 		}
 		for _, msg := range msgs {
-			ethutil.Config.Log.Println(ethutil.LogLevelSystem, "=>", msg.Type, msg.Data)
+			peerlogger.DebugDetailln("=>", msg.Type, msg.Data)
 
 			switch msg.Type {
 			case ethwire.MsgHandshakeTy:
@@ -331,7 +336,7 @@ func (p *Peer) HandleInbound() {
 				}
 			case ethwire.MsgDiscTy:
 				p.Stop()
-				ethutil.Config.Log.Infoln("Disconnect peer:", DiscReason(msg.Data.Get(0).Uint()))
+				peerlogger.Infoln("Disconnect peer:", DiscReason(msg.Data.Get(0).Uint()))
 			case ethwire.MsgPingTy:
 				// Respond back with pong
 				p.QueueMessage(ethwire.NewMessage(ethwire.MsgPongTy, ""))
@@ -351,7 +356,12 @@ func (p *Peer) HandleInbound() {
 					// We requested blocks and now we need to make sure we have a common ancestor somewhere in these blocks so we can find
 					// common ground to start syncing from
 					lastBlock = ethchain.NewBlockFromRlpValue(msg.Data.Get(msg.Data.Len() - 1))
-					ethutil.Config.Log.Infof("[PEER] Last block: %x. Checking if we have it locally.\n", lastBlock.Hash())
+					if p.lastRequestedBlock != nil && bytes.Compare(lastBlock.Hash(), p.lastRequestedBlock.Hash()) == 0 {
+						p.catchingUp = false
+						continue
+					}
+					p.lastRequestedBlock = lastBlock
+					peerlogger.Infof("Last block: %x. Checking if we have it locally.\n", lastBlock.Hash())
 					for i := msg.Data.Len() - 1; i >= 0; i-- {
 						block = ethchain.NewBlockFromRlpValue(msg.Data.Get(i))
 						// Do we have this block on our chain? If so we can continue
@@ -372,7 +382,7 @@ func (p *Peer) HandleInbound() {
 						// we just keep increasing the amount of blocks.
 						p.blocksRequested = p.blocksRequested * 2
 
-						ethutil.Config.Log.Infof("[PEER] No common ancestor found, requesting %d more blocks.\n", p.blocksRequested)
+						peerlogger.Infof("No common ancestor found, requesting %d more blocks.\n", p.blocksRequested)
 						p.catchingUp = false
 						p.FindCommonParentBlock()
 						break
@@ -388,9 +398,9 @@ func (p *Peer) HandleInbound() {
 
 					if err != nil {
 						if ethutil.Config.Debug {
-							ethutil.Config.Log.Infof("[PEER] Block %x failed\n", block.Hash())
-							ethutil.Config.Log.Infof("[PEER] %v\n", err)
-							ethutil.Config.Log.Debugln(block)
+							peerlogger.Infof("Block %x failed\n", block.Hash())
+							peerlogger.Infof("%v\n", err)
+							peerlogger.Debugln(block)
 						}
 						break
 					} else {
@@ -407,7 +417,7 @@ func (p *Peer) HandleInbound() {
 				if err != nil {
 					// If the parent is unknown try to catch up with this peer
 					if ethchain.IsParentErr(err) {
-						ethutil.Config.Log.Infoln("Attempting to catch. Parent known")
+						peerlogger.Infoln("Attempting to catch. Parent known")
 						p.catchingUp = false
 						p.CatchupWithPeer(p.ethereum.BlockChain().CurrentBlock.Hash())
 					} else if ethchain.IsValidationErr(err) {
@@ -419,7 +429,7 @@ func (p *Peer) HandleInbound() {
 					if p.catchingUp && msg.Data.Len() > 1 {
 						if lastBlock != nil {
 							blockInfo := lastBlock.BlockInfo()
-							ethutil.Config.Log.Debugf("Synced chain to #%d %x %x\n", blockInfo.Number, lastBlock.Hash(), blockInfo.Hash)
+							peerlogger.DebugDetailf("Synced chain to #%d %x %x\n", blockInfo.Number, lastBlock.Hash(), blockInfo.Hash)
 						}
 
 						p.catchingUp = false
@@ -486,17 +496,17 @@ func (p *Peer) HandleInbound() {
 
 				// If a parent is found send back a reply
 				if parent != nil {
-					ethutil.Config.Log.Debugf("[PEER] Found canonical block, returning chain from: %x ", parent.Hash())
+					peerlogger.DebugDetailf("Found canonical block, returning chain from: %x ", parent.Hash())
 					chain := p.ethereum.BlockChain().GetChainFromHash(parent.Hash(), amountOfBlocks)
 					if len(chain) > 0 {
-						//ethutil.Config.Log.Debugf("[PEER] Returning %d blocks: %x ", len(chain), parent.Hash())
+						//peerlogger.Debugf("Returning %d blocks: %x ", len(chain), parent.Hash())
 						p.QueueMessage(ethwire.NewMessage(ethwire.MsgBlockTy, chain))
 					} else {
 						p.QueueMessage(ethwire.NewMessage(ethwire.MsgBlockTy, []interface{}{}))
 					}
 
 				} else {
-					//ethutil.Config.Log.Debugf("[PEER] Could not find a similar block")
+					//peerlogger.Debugf("Could not find a similar block")
 					// If no blocks are found we send back a reply with msg not in chain
 					// and the last hash from get chain
 					if l > 0 {
@@ -506,7 +516,7 @@ func (p *Peer) HandleInbound() {
 					}
 				}
 			case ethwire.MsgNotInChainTy:
-				ethutil.Config.Log.Debugf("Not in chain: %x\n", msg.Data.Get(0).Bytes())
+				peerlogger.DebugDetailf("Not in chain: %x\n", msg.Data.Get(0).Bytes())
 				if p.diverted == true {
 					// If were already looking for a common parent and we get here again we need to go deeper
 					p.blocksRequested = p.blocksRequested * 2
@@ -527,7 +537,7 @@ func (p *Peer) HandleInbound() {
 
 				// Unofficial but fun nonetheless
 			case ethwire.MsgTalkTy:
-				ethutil.Config.Log.Infoln("%v says: %s\n", p.conn.RemoteAddr(), msg.Data.Str())
+				peerlogger.Infoln("%v says: %s\n", p.conn.RemoteAddr(), msg.Data.Str())
 			}
 		}
 	}
@@ -546,7 +556,7 @@ func (p *Peer) Start() {
 
 	err := p.pushHandshake()
 	if err != nil {
-		ethutil.Config.Log.Debugln("Peer can't send outbound version ack", err)
+		peerlogger.Debugln("Peer can't send outbound version ack", err)
 
 		p.Stop()
 
@@ -620,7 +630,7 @@ func (p *Peer) handleHandshake(msg *ethwire.Msg) {
 	p.pubkey = c.Get(5).Bytes()
 
 	if p.pubkey == nil {
-		//ethutil.Config.Log.Debugln("Pubkey required, not supplied in handshake.")
+		peerlogger.Warnln("Pubkey required, not supplied in handshake.")
 		p.Stop()
 		return
 	}
@@ -635,13 +645,13 @@ func (p *Peer) handleHandshake(msg *ethwire.Msg) {
 	})
 
 	if usedPub > 0 {
-		//ethutil.Config.Log.Debugf("Pubkey %x found more then once. Already connected to client.", p.pubkey)
+		peerlogger.Debugf("Pubkey %x found more then once. Already connected to client.", p.pubkey)
 		p.Stop()
 		return
 	}
 
 	if c.Get(0).Uint() != ProtocolVersion {
-		ethutil.Config.Log.Debugf("Invalid peer version. Require protocol: %d. Received: %d\n", ProtocolVersion, c.Get(0).Uint())
+		peerlogger.Debugf("Invalid peer version. Require protocol: %d. Received: %d\n", ProtocolVersion, c.Get(0).Uint())
 		p.Stop()
 		return
 	}
@@ -675,16 +685,16 @@ func (p *Peer) handleHandshake(msg *ethwire.Msg) {
 	p.ethereum.PushPeer(p)
 	p.ethereum.reactor.Post("peerList", p.ethereum.Peers())
 
-	ethutil.Config.Log.Infof("[SERV] Added peer (%s) %d / %d\n", p.conn.RemoteAddr(), p.ethereum.Peers().Len(), p.ethereum.MaxPeers)
+	ethlogger.Infof("Added peer (%s) %d / %d\n", p.conn.RemoteAddr(), p.ethereum.Peers().Len(), p.ethereum.MaxPeers)
 
 	// Catch up with the connected peer
 	if !p.ethereum.IsUpToDate() {
-		ethutil.Config.Log.Debugln("Already syncing up with a peer; sleeping")
+		peerlogger.Debugln("Already syncing up with a peer; sleeping")
 		time.Sleep(10 * time.Second)
 	}
 	p.SyncWithPeerToLastKnown()
 
-	ethutil.Config.Log.Debugln("[PEER]", p)
+	peerlogger.Debugln(p)
 }
 
 func (p *Peer) String() string {
@@ -727,7 +737,7 @@ func (p *Peer) FindCommonParentBlock() {
 
 	msgInfo := append(hashes, uint64(len(hashes)))
 
-	ethutil.Config.Log.Infof("Asking for block from %x (%d total) from %s\n", p.ethereum.BlockChain().CurrentBlock.Hash(), len(hashes), p.conn.RemoteAddr().String())
+	peerlogger.DebugDetailf("Asking for block from %x (%d total) from %s\n", p.ethereum.BlockChain().CurrentBlock.Hash(), len(hashes), p.conn.RemoteAddr().String())
 
 	msg := ethwire.NewMessage(ethwire.MsgGetChainTy, msgInfo)
 	p.QueueMessage(msg)
@@ -739,7 +749,7 @@ func (p *Peer) CatchupWithPeer(blockHash []byte) {
 		msg := ethwire.NewMessage(ethwire.MsgGetChainTy, []interface{}{blockHash, uint64(50)})
 		p.QueueMessage(msg)
 
-		ethutil.Config.Log.Debugf("Requesting blockchain %x... from peer %s\n", p.ethereum.BlockChain().CurrentBlock.Hash()[:4], p.conn.RemoteAddr())
+		peerlogger.DebugDetailf("Requesting blockchain %x... from peer %s\n", p.ethereum.BlockChain().CurrentBlock.Hash()[:4], p.conn.RemoteAddr())
 
 		msg = ethwire.NewMessage(ethwire.MsgGetTxsTy, []interface{}{})
 		p.QueueMessage(msg)