Excellent share! I've taken online Stanford courses since before Thun left & started Udacity. They are a great help and they pace you at no cost. My interests were AI. I have used the Udacity lectures in revising some of my CS knowledge esp programming. It is invaluable. I encourage anyone with an interest in CS, AI & Robotics to take up the Udacity courses. People like Norvig are legends in AI and to get such quality education for free... priceless!
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Side note:
I know, generically, they qualify to be startups but the word is overused here. I could be wrong but in a case like this, one can mistakenly undermine the value of these organisations. There are other words