Looking forward to putting something together for these, even if just for fun. While waiting for one of the advanced packs to download, I read through the entire legal terms text. Two things stuck out:

1) By submitting, you forfeit all rights and claims to the work. This is probably standard, and I can see why they require that, but it's worth noting.
2) The judging criteria is as follows: Originality (0-25 points), Creativity (0-25 points), Concept (0-25 points), and Musicality (0-25 points)