DISRUPTIVE INNOVATION IN EDUCATION: KHAN ACADEMY PARTNERS WITH BITTORRENT TO DISTRIBUTE COURSES. The missing element here is back-end certification that students have learned. Provide that, and the higher education bubble will burst even faster, I suspect.

UPDATE: I had some related thoughts here. And reader Matthew Thornton writes: “With clenched, upraised fist and the best Shatner imitation they can muster, are the higher education types screaming, ‘KHAAAAAAAAANNN!!!!!!‘?” That would be cool.