Hot off the press: FreeEmergencyTalks.net
Dr. Joe Lex (Temple) is constantly recording lectures from national EM conferences and compiling them into an amazing respository of free audio (MP3) files. The 2009 AAEM Scientific Assembly lectures will be added in the next few weeks.
The slogan is "Emergency Medicine education for everyone". This searchable, catalogued, open-source website is a big leap into the world of Web 2.0. What a great idea.