Fantasy Sports Sites
Fantasy Sports Contests and Websites
Fantasy Poker from UnknownPoker.com - Article about the recent popularity of fantasy poker leagues. (Poker is possibly the newest "sport" to get the fantasy treatment.) ODP Fantasy Sports Sites - The Open Directory's volunteer edited list of fantasy sports.
Spread Weekly - This is more a site aimed at sports bettors, which is a similar audience to ours. Be sure to obey all local laws related to sports betting in your area.
It's not fantasy football, but if you're into games, I've got a buddy with a cool site about online craps. Check it out.