The basketball thread reminds me of a few athletes I've gotten to meet (sorry, I usually just don't think of sports when browsing this site).
I've played pickup basketball games with/against:
Bob Sura, Michael Boulware, Kenyan Weeks, Peter Warrick, Ron Dugans, Laverneaus Coles, Warren Sapp (an absolute asshole to play against, but still somehow likeable), Roy Jones, Jr., Matt Geiger, and Dwayne Schnitzius.
Played intramurals with/against - Sebastian Janikowski (we were teammates - believe every crazy story you ever hear about him), Anquan Boldin, Chris Weinke, Alex Barron, Corey Simon, Marvin Minnis.
Also have gotten to chat with Bobby Bowden a couple of times.
Also, had a girlfriend leave me for a player for the (Devil) Rays. Made the parting a lot easier to take, actually.
Once bumped into Randy "Macho Man" Savage coming out of the movies once. Really nice guy.