I gather I'm late to the game here, as it was rated on CNN's top 50 sites of 2009, but this is a really cool site. I'd run into Yale's free online video courses a couple years ago. These are not simplified public outreach courses designed for non-students, they are complete college courses by highly rated lecturers which are filmed while being taught and then made available as a whole on the web.
AcademicEarth aggregates those Yale courses along with more video courses from other top level universities. There are currently about 130 courses available.
Learning Notes Week of April 17
14 minutes ago