Have I ever told you that I love the internet? I have already told you about academicearth.org , but I just discovered something that is really worth being on your bookmarks. Youtube EDU : http://www.youtube.com/education?b=1 . I found it from openculture.com (for the latter you should subscribe to RSS).
Youtube is full of channels of universities (200 colleges and universities ->40.000 videos)
Kostas Antonakoglou 