Jon Matonis' latest in Forbes:
Bitcoinica Registers in New Zealand for Bitcoin Margin Trading
First of all, anyone can trade — with just $1 or ฿1. As with forex trading, there is no commission — only the bid/ask spread. Customers place buy or sell orders with a leverage variable selected anywhere from none to a factor of 10:1.
I sure hope people not already familiar with FOREX will understand that bitcoin exchange rate volatility + leveraged trading = getting zhoutonged
(zhoutonged described here: http://www.youtube.com/watch?v=kdvTkddp1F0
lyrics are not necessarily safe for work)