I've found Coursera; it is amazing. It's a web site that presents courses of high quality from leading universities on various topics. You can see the courses I'm taking in my profile.
My first class, which is going on as I type this, is on Sound Design. It is amazing, and feeds right into my personal quest to understand electronic music. It's taught at a rather advanced level, and is quite challenging at times, but I'm getting a lot out of it. Good stuff.