If you like this sort of thing, you might be interested in my "Let's Play TDD" series. 187+ episodes (!) developing a real-world Java application using test-driven development and evolutionary design, with audio commentary. http://jamesshore.com/Blog/Lets-Play

My experience with the screencast biases me, but I prefer the straightforward video recording approach to thecodeplayer's approach. It's a nifty hack, but a screencast is simpler and more flexible. An audio track is particularly important for this sort of thing, I think.