I own an HP tx1000z Tablet PC. It’s a really great notebook, but the touchscreen isn’t all I thought it would be. I’d heard about this software called Touchkit that could increase screen sensitivity (among other options), and until today was unable to successfully find it.
Touchkit, made by EETI, has versions for Linux, Mac, and Windows (including Vista). I recommend disabling cursor stabilization if you’re going to be writing: open the Calibration Utility, click the Setting tab, then click Option.