Here's a quick note for anyone looking for free online courses: The University of California - San Diego now gives you free access to more than 80 courses. (Access the full list here.) The courses, mostly rooted in the sciences, can be accessed via iTunes or rss feed. We've integrated some of these courses into our own meta list of Free Online Courses from Great Universities. It now includes about 215 courses, and we'd encourage you to bookmark the page and use it often.