There is a setting for the Fujitsu Touchscreen in SaX2 (YaST -- Hardware -- Graphics Card and Monitor). Look under Touchscreen. However, during the SaX2 test procedure, there is no evidence that the touchscreen is working.
Ubuntu users report that the samengstrom touchscreen driver for the P1510 can be made to work, if you modify the Perl script to use the P1610's dimensions. Unfortunately, the default openSuSE 10.2 install does not have the Perl module required (X11::GUITest) to use the samengstrom script.
Following the instructions on the samengstrom web-page...
cpan> install X11::GUITest
# chmod a+rwx /dev/ttyS0
Unfortunately, if you rotate the screen, the touchscreen driver should also be re-started to take account of the new screen dimensions. The fix to this problem is very briefly sketched out in a post by mark.w in the LeoG ultraportable forum .