Dave Zirin was the keynote speaker at Rising Tide. His talk was a smash hit, as I'm sure you've heard.
I had heard of him before this on Deadspin and places like that. He's one of those guys that's been really interesting and I've always been meaning to read his stuff, but never gotten around to it.
The writing seminar was a bit boring (although I'm told the second half was much better), so I went out and chatted with him. I ended up buying his book and he signed it (with, "PS- You're with me, leather"). Oh yeah, I'm surprised no body linked to this, but here is the Jocks for Justice page
Check his book out. Also, keep a lookout over at Deadspin. Rumor has it, they'll be interviewing him very soon. Deadspin interviews are always EXTREMELY interesting. Check out this one with Harold Reynolds.