Cory Doctorow, of the Electronic Frontier Foundation, gave an incredible talk to Microsoft's Research Group on Thursday about why DRM is a bad idea. In it he touches on the rights consumers have with copyrighted material—or don't have as is becoming increasingly the case with DRM technologies. A must read as it clearly explains that we're in a transitional period toward a new medium of content delivery, with a futile attempt by those who control the old medium to prevent the transition.
Update: There's a more readable HTML version on Anil's site. I have removed the full text of the speech from this site to save space.