Thanks to a handy post by Admiral Drax, I'm now aware of the 6 Month Mountain Reduction and Painting Challenge, hosted by The Spider Web of History. It's pretty straightforward--you basically don't buy anything in terms of miniatures for six months except for painting supplies, and you paint your own minis for six months, posting pics every week.
I've been lousy about my painting lately, for loads of reasons, and getting a goal and some inspiration might be just the thing for me. It begins June 1 through November 30, which is a good chunk of time.
There's lots of things I could paint up: ICE Space Rangers, Warmachine box sets, some Nazis... I'll give it a day or two to think about, and then make my decision.