The concept seems fine, as far as I'm concerned, as long as SE is comfortable programming it. I'm still in for when you guys need tiles.
I'm wondering what we're doing for sprites, on the other hand. All my attempts at animation turn out pretty horrible, so I'm not confident I'd be able to provide anything with quality to it. There's always the possibility of finding a base to work from, I suppose. Does anybody here have experience with animating sprites?