I rebuilt my HP TC4400 TabletPC with the Release Candidate 2 of Windows Vista the next Windows release from Microsoft still in testing  but expected to be shipping this fall. I also installed the Beta 2 of Microsoft Office 2007 and One Note 2007. Pretty sweet setup and it is actually running pretty fast and supporting Aero. I will be using this TabletPC while traveling this week to the CAD Midwest Technology Expo 2006 in Kansas City as well as bringing along my ThinkPad T60p laptop as my main machine. The Microsoft One Note on a TabletPC is one of the most organized and fastest ways to take notes and thoughts during a meeting. Windows Vista Ultimate version on a TabletPC seems to be even better than prior Windows XP TabletPC edition in the recognition of my less than perfect handwriting.