So incidentally I don't remember who suggested it in the other thread (gr8 I think? Sorry if I'm wrong) but I do like the idea of keeping the "upper" half of the suggestions made for themes and carrying them over to the voting for the next contest, minus the winner of course. It seems like it would save a lot of time on collecting ideas, and since you'd still be collecting a bunch of new ideas each round it's not like it would end up stagnating.