Well, I'm tending to the spooks since I'm not aware of any local costume parties worthy of my attention. (Being a geek probably figures into that.)
My brother, however, is going to such a party. He's dressed as a false dichotomy. Or something.
Anyway, while you're out, make sure to watch out for roving gangs of pumpkins. I'll be catching up with the JREF forums. Been a while. Might practice some thread necromancy.