Hmm, so now that the thread's been up for a while, I have a proposal to throw out, aimed in particular at anyone who's new or would like to post, but is uncertain about where to start.

Would people be interested in having a running volunteer prompt? There wouldn't be any expectation to participate, particularly if you have ongoing art projects or a consistent source of inspiration. Instead, it would be more or less a suggestion every week or so to help get the creative wheels turning, a bit like the prompts for the artist's training grounds on Equestria Daily (though much less frequently updated). Anyone would be free to make something for it or ignore it, as they chose.

As of right now, this is just a suggestion I'm toying around with, but I'd be interested in others' input, especially from people who feel like they're having trouble getting started or continuing to draw.