Human Computation, Captcha, and ESP

I was trying to do some work when I stumbled upon this link. Needless to say, my work got put off until the video was over. This is a really kickass presentation on Human Computation. The presentation is by Luis von Ahn who is an assistant Professor at Carnegie Mellon University. Pre-interview he looks nervous and bit squirrely. Needless to say, he did an awesome job. He starts off discussing the pros and cons of captchas. He moves on to cover human computation and how he has applied it to his ESP game.