Nice overview of Lonestar (aka Tablet PC 2004). Lonestar rules. I've been running it for a while now and it's made my tablet so useful in pen mode. One of my big gripes about the Tablet PC User Experience so far is that Windows XP is just so mouse/keyboard focused and that entering text via Ink was just excruciatingly painfully. I think over time my usage of pen vs keyboard went from 30% to less than 10% as the novelty factor wore off. However, with Lonestar I can do e-mails in Outlook quite efficiently (as well as browse the web etc).
Lonestar is going to be a boon for the Tablet PC and means that we get some much needed usability enhancements before Longhorn!