I'm not sure where Donna Wenthworth gets her energy from and manages to keep up with so many developments, but Copyfight is a must read (as usual) on everything from PIL 2003 to the fascinating "The Layers Principle: Internet Architecture and the Law"by Lawrence Solum and Minn Chung to Seth Finkelstein on the DMCA, fair use and Eldred. But don't waste time here - head over to the original for the complete works.