So far, I'd agree that Udacity does a way better job than any of the other online courses do. Khan Academy is pretty good, but for Computer Science, Udacity is almost perfect. I've never been more excited to take an online class. It has the perfect combination of human interaction(that Codeacademy lacks) and lessons intended for online students(which almost every other courses except the Stanford ones lack). I've been frustrated by the quality of education in my Uni for the past year, and always taken a keen interest in online classes.

I only wish there was a similar class for Algorithms/Data Structures. Almost all other subjects, I've found good resources online which I can learn from, but MIT's old Algorithms and Data Structures class, taught by Prof.Charles Leiserson, is a far advanced class. It focuses more on the theoretical proofs, methods, than it does on implementing the actual algorithms. Not lying, I was in tatters after watching some of the lectures, lost confidence, and was convinced I would never be a good programmer. (I'm better now, and more confident in my abilities).

Lets hope there's more good stuff online.