Yeah, lots of Forex dealers. The eMini presenter mentioned something about no commissions but large spreads when trading Forex. If the trading firms act as market makers, they could be front running the trades.
I just finished attending Green's Tax seminar. Lots of good info for traders. I especially liked the hedge fund strategy for successful independent traders who want to manage OPM money. They have something called an "incubator" fund that is cost effective.