Online Introduction to Artificial Intelligence Class

Stanford University is giving a free online class in Introduction to Artificial Intelligence. The course is presented by Sebastian Thrun and Peter Norvig, and is based around the textbook Artificial Intelligence: A Modern Approach. I signed up for the course two days ago, and 13000 more signed up since then; there are now 113 thousand people signed up for this unique opportunity. Sure won't hurt their book sales, either.