The Library of Congress funded
Preserving Virtual Worlds Project
The Center for Internet & Society: http://cyberlaw.stanford.edu/
Play Machinima Law Conference, Stanford Law School: April 24-25, 2009.
The Twitter feed: http://search.twitter.com/search?q=%23pml
The very cool Hackleman Brothers': Myndflame
An older post from the Virtually Blind blog (no longer updated): Virtual World Screenshots Raise Copyright Questions... scary, scary, scary.