The newly lunched and run by Richard Ludlow, a graduate from Yale, Academic Earth brings video lectures from leading universities into a centralized user-friendly site. The site offers 60 full courses and 2,395 total lectures (almost 1300 hours of video) from Yale, MIT, Harvard, Stanford, UC Berkeley, and Princeton that can be browsed by subject, university, or instructor. It's open. The videos can be embedded anywhere or downloaded and enjoyed wherever you want to take them. It's easy to use, has tons of great content, and it's free.
Academic Earth is an addition to the current Open Education Movement and e-learning or mobile learning. iTunes U, MIT OpenCourseWare, Stanford Engineering Everywhere, and many free courses from other colleges and universities , plus most recently lunched Youtube EDU, are all part of the open education movement.