Bush of Ghosts CC Reprise
As previously observed here, David Byrne and Brian Eno have not only recently re-released their My Life In the Bush of Ghosts album, but have also made all of the multitracks of two of the songs on the album free for re-mixing under a Creative Commons licence.
Things are getting really interesting in this area. Eno and Byrne are the first artists of significant stature to do this as far as I know. This is what I think it might lead to at some point.