YouTube EDU - educational videos from colleges and universities

On March 26, 2009, YouTube EDU section was opened on youtube, which contains the best educational videos (mainly lectures and educational materials from colleges and universities).

Among the leaders views: MIT , Stanford University , Indian universities .
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The whole courses are presented in the form of playlists: a course of linear algebra , an introduction to biology , principles of digital communications, and many others.

Information becomes more than enough to study anything. Only the question of motivation remains.

Upd. Another similar resource is academicearth.org (Zhenya Teplov, thanks!)
Upd2. University of Washington, Engineering & Computer Science ( YasonBy , thank you!)