I am doing it as well! I've raised well over what I anticipated. When I initially posted the event on FB, I got no responses, but when I sent a personal note to each and every friend (over 200) on FB, the response has been overwhelming! Good Luck you guys! :)
I've done FGB before (wall-balls are tough when you are only 5'2" tall!), but this year, I have already committed to take some friends climbing at Joshua Tree. So I saved up $200 and donated it in various amounts to all of my friends who will be doing FGB at my box (Crossfit Hollywood). Good luck to everyone who is participating!