The University of California at Berkeley has released over 250 hours worth of video with educational content, including classes, symposiums, and events. (Hat tip to Tara Calishain)
The press release from Berkeley has more details:
UC Berkeley offers courses and symposia through Google Video
I'm finding myself excited over the Information Systems 141 - Search Engines: Technology, Society and Business videos, which include speakers from Yahoo!, Google, and Microsoft, as well as others.