Yes, Xillix, we shall assault the city with force and great army!
But the city has to stand first

The
ABC license is to be signed at the very end of the contest, so there is nothing to worry for now, as far as i'm getting it. But then the team member has to find fax somewhere and fax it. If Someone is worried about giving rights away, then don't be. All you do will be too much planeshift-Klyros style specific, that you could logically use it anywhere else, so if additionally you won't be allowed by the license, it really isn't a big prolem. You won't loose right to showing the stuff around and telling you did it as a proof of how good you are.
Yes, we have to follow guidelines, but these aren't that strict. Texture size limits and thus detail limits are annoying, but from other side it is faster to make a small texture than a big one.