Rob at www.gottabemobile.com has posted a cool video of the new Tablet Input Panel that ships with Windows Vista. Very similar to the one from Windows XP Tablet PC edition with SP2 but the best new feature I like is being able to highlight regular text and open it in character recognition mode in the input panel. Allows for easy editing of typed text using ink. Check it out http://www.gottabemobile.com/VistaTIPSoftwareInkShow.aspx.
Also check out TEO 3.0 from Josh Einstein at http://www.tabletoutlook.com/. Nice add-in for Outlook to make it much easier to use it on the Tablet PC. Josh also helped me a great deal on my current project and some of the best ideas we implemented in our own ink controls we stole (with his permission) from him.