(I haven't searched the forums, so it's possible this idea already exists somewhere in the vaults.)
Do you think it would be manageable/fun to have a Mod-a-Game competition. That is, given a fixed time frame (like the 24 hour competition), find and modify an existing free game (I'm thinking Creative Commons BY-SA maybe?) into something that's still close to the original but at the same time something new.
How about each contestant chooses a game to modify first, and then is assigned (randomly) two or three themes from a predetermined list of themes (like the latest 24 hour comp.).
Thoughts? Feasible or completely bonkers?