He admits to paying about $150M a year in commish. Fascinating operation, huge trading floor - has about $4B under mgmt last I read. All employees sign huge non-disclosure agreements.
He basically says he pays full price to brokers so that he gets the first call when there is news.
I think he also takes about 50% of profits and his funds are closed. That's right, 50%.
Check back through the archives here, should be a few threads with more details...also on SAC Capital...that's his firm.