The Wolf Bytes created a very cool (and free) Scheduling and Twitter tool influenced with the Windows Phone 7 Metro design guide lines. It's one app, built for five platforms.
After you download the session data, you can view the schedule and build your own custom schedule. With the Twitter tool, you can view tweets for the main conference hash tag #TechEd as well as build up a favorite list of tags you wish to follow.
The app works on Windows Phone 6.5, iPhone, Android, iPad, and as a Sidebar Gadget.
If you're going to TechEd 2010 in New Orleans, you have to get this free app!