I've just released the first version of a new API for interacting with Bitcoin exchanges for node.js. I've been using it for a couple weeks now and it seems to work pretty well, but no guarantees.

Goal:
The purpose of this project is to provide a robust enough interface to interact
with Bitcoin exchanges (in whatever way that might be) without going into things
that necessarily should be customized such as trading bot strategies.

Current Features:

• Mostly written for compatibility with Mt Gox API
• Known to work with: Mt Gox, TradeHill, Bitcoin7 (via ExchangeB7 class), ExchangeBitcoins
• Check Account Balance in USD and BTC
• Place Buy and Sell Orders
• Find out the cost (USD) to buy a given amount of BTCs (including trade fee) on an exchange
• Find out the gain in selling a given amount of BTCs (including trade fee) on an exchange

Install:

Code:

npm install btc-ex-api

Source:
https://github.com/freewil/btc-ex-api

I just thought that some of you may find this podcast on HFT interesting, many of the same types of topics I've seen recently on this forum about Bitcoin are discusssed here in the larger financial markets.