Copyleft Attitude is a pretty tasty looking site, although accessible only to francophones, at least for the time being.

The maintainer of the site Antoine Moreau defines the purpose of the site as follows: ".... to make known and promote the idea of copyleft in the realm of contemporary art. Taking as a model practices connected to free software to be inspired by and apply them to artistic creation. It is for that reason that we have designed the 'Free Art License'. It's a tool for creating works by authorising the free reproductio, free distribution and free transformation with respect to author's rights."