For a very grassroots, underground, home-spun effort by a bunch of die-hards, drop on by:
http://www.fantasyfootballer.com/.
If you are interested in experiencing and being part of a site's
slow, but steady evolution from just a league site that was opened in 1999 into a full-fledged fantasy site, I would REALLY suggest checking this site out. Besides the forum, there are some nice features, including "the Gridiron Newsstand", which has links to like EVERY newspaper covering an NFL team along with links to ALL the official sites (and more to come in the near future), "The REAL Feed", a beefed-up news feed, "Articles on Fantasy Football" that really are halfway intelligent, and a TON of smilies to use in your messages.

We
are a hardcore bunch, but I'd like to think that we can rival the "friendly" atmosphere that has been fostered here at FantasyFootballCafe.com. Also, the site is ABSOLUTELY FREE, meaning including being FREE of advertisements!