I was just going to come in here to ask where to put Backgrounds. This sounds like it would be good for that. Maybe I should just wait?

 Or else, meanwhile, where do I put a background pack? It's not intended as art, it's intended to be a resource. 

Hmm.. it wouldn't even necessarily have to be called 2d resources - just resources, wiht and explanation, brushes, etc.

I'm interested, too, in finding such things - what category are they in right now? I have no idea where to look for them.