I'm not sure if this is the right place to report this but I think the touch screen pressure code is backwards (or google picked an odd way to represent it).
If you go to 'Dev Tools' > 'Pointer Location' the current pressure is displayed at the top of the screen. Now I'm assuming that this is scaled from 0 to 1 with 1 being as higher force as possible. However on my n800 the harder I push the closer to 0 the value goes.
This does explain why the on-screen keyboard is a bit odd to use with multiple key presses being detected for no reason. I'm guessing the pressure calibration code still needs tweaking.