The TechEd Keynote featured Samantha Bee, one of the reporters on The Daily Show. She had a pretty funny intro, which hopefully you'll see on the keynote webcast along with a transcript and the slide deck. Ballmer was his usual gregarious self, making several comments about his "new best friend" Scott McNealy. They also showed the new Lenovo Thinkpad Tablet PC.
The coolest new thing I saw was the new Exchange Service Pack 2 feature that allows a device running Windows Mobile edition to be "wiped" of data REMOTELY. Now that's pretty slick.