Still too early to tell, but if I was to Guess....
Working on Bookmaker for POKER, not sure if they are into Forum Contests.
EZ, & WagerWeb should have Both College and Pro Football Contest. I also will say probably BetPhoenix as I remember them doing them.
BetDSI might, not sure.
and I'm sure SportsOptions will do Something during Football season, but as we know. They are Not a Book.