I just noted that on the different markets for bitcoins the prices vary a lot.
A calculation based on the current prices for Mt Gox and Britcoin (live updated) can be found at
http://projects.delux.me/bitcoin_arbitrage/As I do not own accounts on any of the trading platforms, you are welcome to contact me if you own accounts on multiple trading platforms. I have experience in creating bots for real money trading platforms and would love to write a working one for this platform as well : )
best regards!