Carnegie Mellon’s Open Learning Initiative is a set of 5 online courses, including Causal Reasoning (I read that 3 times before I realized this wasn't "Casual Reasoning" which I think would be very popular), Chemistry, Economics, Logic and Statistics. Unlike the MIT OpenCourseWare, apparently these courses are much more interactive and community enabled. Since the MIT courses really suffer from the lack of even a per-course mailing list, I think these features are important. Plus, I love the idea of hosting the courseware in a smart client...
