I've just made a blog post over on Free Gamer about the lack of a strong copyleft for artists, and a potential solution (which I'm currently arguing in favor of in a discussion on the CC community mailing list).  As usual, I love a good controversy and I'd be interested in hearing your comments.  Here's the link:

http://freegamer.blogspot.com/2011/12/why-we-need-better-copyleft-for-ar...

Please reply to me there so I don't have to keep track of the replies in two places. :)

Bart