I've never heard of it, But it sounds pretty good, gotta a love a place where that has a touch of almost everything.

True to its name "All-Con" is the multimedia event that unites fans from diverse interest communities under one roof, for three exhausting days that are just plain fun. Fans of science fiction, art, costuming/cosplay, literature, collectibles, Asian ball jointed dolls, roller derby, maid culture, anime, short films, Otaku, burlesque, games, celebrity guests, contests, pageants, discussion panels, workshops, and performances will have their whole weekend filled at the single event.

I may go to this,

http://www.all-con.org