I just wrapped up a game jam at the Art Institue over the past weekend (screenshots pending). We didn’t get much in the way of innovative gameplay implemented, mainly just expanding the behaviors that Gamini has. Ideally these game jams should be more about totally radical ideas. You have 3 days at most so you’re not making a “real” game, so why not go nuts on the design. Something that, to me, seems like a gam-jam kind of project and pretty interesting is The Unfinished Swan by Ian Dallas. They have a really cool video on the site that’s definately worth your time.