I agree. A good manual should cater to both new users and veteran users of that product. To be fair to Toshiba though, the speech and many features for the Tablet PC Edition came from Microsoft. It's part of the OS. But I do agree that SOMEONE should write a good manual for these features as they are powerful when used right.
If you are up to some reading, check out Microsoft site for some XP Tablet Edition info. Also, if you want to make it more fun, check out the Power Toys designed for the Tablet here: http://www.microsoft.com/windowsxp/downloads/powertoys/tabletpc.mspx