Here is the Openlaw archive for the Lessig copyright case that goes before SCOTUS this Wednesday. You'll find copies of the relevant documents, including briefs from:

Yochai Benkler, Pamela Samuelson, Milton Friedman, Hal Varian, Eben Moglen, Jessica Litman, Eric Freedman, Phyllis Schlafly, David Post, ACM, CPSR, FSF, Apache Software Foundation, AOLTW, ASCAP, BMI, the Gershwin Trust (Ha!), Philip Glass, Dr. Seuss Enterprises, MPAA, Nashville Songwriters, RIAA, and many more.

Even Ken Starr is involved!