I just finished Coursera's Machine Learning class. I did OK the first time, but wasn't sure about some concepts, so decided to do it again. It was much easier the second time.
If you're interested in machine learning and collective intelligence, this is a great course. I can't post the code, but would be glad to help if you have any questions. Prof. Andrew Ng did an awesome job, and it's great to see his success with Coursera.
Coursera is revolutionizing higher education, just like Khan did for elementary school. Harvard's edX is also doing a good job, particularly for programming languages.
Exciting times for MMOC's. Imagine how much this will change education over the next 10 or 15 years.