BerkeleyX: CS188.1x Artificial Intelligence

I've been taking a great free online class on edx.org called BerkeleyX: CS188.1x Artificial Intelligence. The lectures are interesting and move at a reasonable pace, the projects are well thought out and instructive, the professor is interesting, and there are occasionally some more advanced topics discussed.

I'm totally a fan, and I may take more of these in the future.