I finally downloaded this off of my camera. It is from 11-24-08. My! How things have changed! He used to sort of bounce up and down whenever we sang the ABC song. He still likes to dance and he still sort of bounces but it's less "gyrating" and more bouncing. I think he would really like to be able to jump and that's probably what he's trying to do :).
Also, within a day or two of this video he was able to climb up the stairs. You can see him in this one working to get his knee up the first step. It didn't take him long at all to figure it out. Once it got one up the rest was history!