providing you've run the calibrator (icetouch) under LinuxICE and you still have a swapped X and Y axis, you can add the following to xorg.conf evtouch device options:
This will rotate the screen counter-clockwise and un-swap the X and Y.Code:option 'rotate' 'ccw'
Hope this helps.
BTW, if you've been able to get evtouch working in gentoo, could you mind giving kantlivelong a hand. He can't get the touchscreen to work at-all using gentoo (Xenarc MDT-X7000 Gentoo).