Nice article from Cringely
Cringley documents how P2P filetrading will effect some media more than others. He thinks text will be the most effected, then music, and that movies will not change much. I agree -- consumers have already backward integrated into most text-based content--the web and my inbox are much more interesting to me than the largest library or book store. Mashups are the area of music where consumers have backward integrated into production (through becoming DJs), and it's hard to see what content owners can do about that. There isn't a good analog for film.