With the SEC moving towards limiting the amount an ECN could charge to 1.00 per thousand and thus reducing the rebates to zero this could a REAL dent into the rebaters game. Some firms have built their entire model on this type of trading. I see them closing quickly after the recomendations are excepted by Nasd, could be in 7-8 weeks.
Never played the 'bate game, but it sounded like fun.