Write an RPG in 24 hours, during November, in the Pocketmod format, without any numbers. Hard enough for you? Run as part of NaGaDeMon http://nagademon.com
Nnnrgh. It's getting difficult to stave off my swirling brainstorming prior to November. I have an interesting notion for a core mechanic, though, and I think I've managed to find a theme and a game that fits it.
Excellent. This is definitely making me think about mechanics in a unique light!
(I actually plan on using d6es in a sneaky way that totally sidesteps numbers. I've only got the concept of the idea, but haven't started on the mechanics of it--naturally.)