I have a copy of the Amazing Colossal Mystery Science Theater Episode Guide, and in the back of it, there's a guide to the fifty most obscure references they've ever made (although some of them don't really seem that obscure to me; that probably says something about me).
I've been thinking that it might be an interesting feature, now that we've got a number of MiSTings under our belts, to do something like that. Any thoughts?