I apologize for not being timelier with these.
Via Scoble’s blog in September, he mentions about a Tablet app used by restaurant guests to order from a huge menu of wines.
I originally saw this from Mary Jo Foley, but her colleague Sean Gallagher blogs on a private high school recommending the Tablet PC as the device of choice.  TabletPcBuzz included more comments on this story including from the school’s Network Administrator.
Dr. Neil has a nice MSDN article on sharing code between desktop and a Tablet PC.  He also has an article coming out in the November issue of .NET Developers Journal on new features for developers in Microsoft® Windows® XP Tablet PC Edition 2005.