While UC Berkeley has been sharing a limited stream of its lectures as public videos since 2001, it is stepping up the effort with a dedicated Cal page in Google Video. In fact, sharing the valuable access is part of its curriculum strategy, part of the wave of ‘coursecasting’ as Reuters notes. Currently more than a dozen college courses and symposia are available, with more to be added in the coming months.
(Very much in the spirit of public education, I might add. w00t, alma mater!)