I tend to use wikis for that, but... eh. I know a lot of folks who ended up getting drowned by spam bots. I set my game with a password and put it on the front page as "the password is my daughter's first name", which keeps out anyone I don't know and vice versa, but you'd need something like that at the least. "The password is the name of the Protege character from the core Masks rulebook" or something? I dunno. Probably not the best answer, either, not for pictures and stuff.