Larry Lessig, Stanford law professor and Creative Commons founder posted the following presentation about copyright law and fair use on You-Tube. Warner Music sent a take down notice and now it seems they are going to have a fight on their hands and will quite proably loose. Ironically thisi situation is excactly \what Prof Lessig's presentation was about.
Anyway the video is fascinating and very in formative.
http://www.lessig.org/blog/2009/04/update_on_warner_music.html