Advice, PLEASE! (Fandom Related)

I posted the following over on the TtH webforums, too, but I think I may get more response here on LJ.

( I'm thinking about starting a crossover edition of Last Fan Fiction Writer Standing, but... )

What do you think? I'd set it up as a Buffy-centric crossover competition first, if I get enough interest, as that's where I've seen the most fans so far; if that goes over well, I'd be open to running a Stargate-centric crossover one as well, or other fandoms according to demand.

Comments, please.