www.academicearth.orgAnother site (in beta) offering university course videos has come to my attention: www.academicearth.org, founded by Richard Ludlow. You can watch lectures delivered by professors at Berkeley, Harvard, MIT, Princeton, Stanford, and Yale. The offerings are organized into seventeen subjects:
AstronomyYou can also search for lectures by any combination of keyword, user rating, university, and subject.
Many of the lectures can be downloaded in QuickTime format.