I'm not sure if this has been documented; I just found this out by accident. On my N800 running KDE v2, I can toggle the stylus tap to perform a right-click by pressing the home button. Press again to toggle back to left click.

Now if I can get 1) number/symbol keys on the virtual keyboard, and 2) dialog resizing to work, I'll be happy.

Is there anyone using KDE regularly with an N800?