The availability of free online coursework these days is quite amazing. Standford has a decent list, which surprisingly includes anatomy (registration is open). MIT Opencoursware was the first free online courses I’ve heard of and you can even subscribe to some of the courses on iTunes. As a refresher for a course I’m taking next term (pdf link), I followed along a class from Standford, which not only posted its lectures but its great projects. Basically, the projects involve implementation agent behavior, search, and decision algorithms for PacMan!
I didn’t finish all the projects, but the final project looked like a lot of fun!