Online learning is finally coming into the promises made in the early Internet. From MIT CourseWare to Khan Academy to today's offerings, it's all getting better.
If you haven't heard of Caltech's "Learning from Data: Introductory Machine Learning Course", it's well worth a look. Dr. Yaser Abu-Mostafa is one of my favorite professors and I learned a great deal in his courses. He's redefined excellence in online learning with his course.
ENGenious (the magazine of the Division of Engineering and Applied Science at Caltech) has a great interview article about the course, the professor, and the process. If you've thought about jumping into university level courses from a top (well, #1) rated institution, I seriously recommend checking out the course offering. And the price is right.