I don't roleplay, but I do know one thing.... there are already 24-sided dice. In fact I've seen dice with (I believe) 36 sides...
Man, that brings back memories. In high school we used to get stoned and then play D&D for hours (sorry guys no demons every showed up and no I never started worshiping the devil - we were all about scoring with virgins, not sacrificing them [what a waste of a virgin]).
Coolest character was this half dark-elf/half-human wererat assasin. I also had a pretty solid druid, although he was SOOOOOOO hard to work up. Good times, good times . . .