I'm just poking my head in here to sing Udacity's praises. Their CS-101 class is phenomenal; it is hands down the best intro to CS on the web. The fact that it'

I'm just poking my head in here to sing Udacity's praises. Their CS-101 class is phenomenal; it is hands down the best intro to CS on the web. The fact that it's free is just icing on the cake. The 1 unit per week for 7 weeks pace is demanding -- and I think users would benefit from the doubling of the course length -- but the videos, professors, community, quiz frequency, and challenging homework make for one hell of a learning experience I've never seen before online.