One thing that I noticed at TechEd this year was the use of TabletPCs by Microsoft employees. In just about every session I went into and all over the Cabana area TabletPCs were out and about. I saw a lot of the Toshiba convertables, but there were also several Fujitsu and Motion slates. I find that taking notes with pen just works better for me. It's hard to draw the ad-hoc class and data diagrams otherwise.