Earlier today, Matthew Guzdial from Georgia Tech gave a research seminar at my university. It was really interesting and surprisingly accessible, he talked about his work training an AI to design video games (Not play them. Design them.) Yuli and Starspawn are talking a lot about this sort of creative AI, so it seemed appropriate to post here. Some technical details were discussed, but it's late, so I can talk about those tomorrow if anyone is interested. Or you can just read the paper.
Some links on this topic: