Lucas Gonze has created a modified version of the Oyez' presentation of the Eldred vs. Ashcroft arguments (a very important recent copyright extension case). His modifications make it possible for third parties to add commentary and analysis.

The Oyez original is at
http://www.oyez.org/oyez/audio/1526/argument.smil

A weblog entry on his modifications, including instructions for people who want to add comments, is at
http://gonze.com/weblog/index.cgi/eldred-annotation.ongoing.