From the Digital Rights Management Conference, February 27- March 1, 2003, sponsored by the The Berkeley Center for Law and Technology: Lon Sobel, DRM as an Enabler of Business Models: ISPs as Digital Retailers, 18 Berkeley Tech. L.J. xx (forthcoming 2003) (Word, PDF, HTML).
See also this New York Times article, Pondering Value of Copyright vs. Innovation, reviewing the conference.