I'd love to have a PGD Challenge that is all about AI.

The thing I love about the whole topic, in some ways Ingemar is right (it's a bit overhyped), you can hack at it and as long as you make it look like it's doing something intelligent, or behaving intelligent, then you have a pretty good game AI. It's something that can be easy to get into, but can be hard to master.

I think such a challenge would have your players go against and try to "beat" it OR create non-player AI character/bots, etc that have to work with the player in some way.

Designing the challenge rules might be as interesting as designing the games that go into the challenge it's self.