Kind of, I guess. I'm playing in a 'Weird Wars' game, an 'All Flesh Must be Eaten' game, and a couple of d20 offshoots. I really wanted to get into Deadlands or M&M but I think they're all filled...
Heh, heh, funniest entry I've found in the catalog so far: there is a "Land of Og LARP." No, I'm not kidding - you can really sign up to pretend to be a caveman and grunt wildly for several hours - Friday afternoon and evening, if I recall correctly.