Ok I got Xubuntu Oneiric successfully installed on my TC1100 (1 ghz Pentium M) runs nice and cool, I got rotate to work using the script at the beginning of this page. Note that the proprietary Nvidia drivers (Nvidia 96) are already installed and work out of the box in (X)ubuntu 11.10 so you have to edit your xorg.conf to use XRandR for the rotate script to work.
I also got the screen brightness adjustable using this script
Identifier "Default Screen"
Option "AddARGBGLXVisuals" "True"
Identifier "Default Device"
Option "RandRRotation" "True"
if [[ ! -f /sys/devices/platform/tc1100-wmi/jogdial ]]; then
zenity --info --text="This kernel does not have TC1100 WMI support."
echo 0 > /sys/devices/platform/tc1100-wmi/jogdial
zenity --info --text="Use the jog dial to adjust the brightness. Press OK when done."
echo 1 > /sys/devices/platform/tc1100-wmi/jogdial
The only problem with this is that you have to use sudo or gksu to make the script work
sudo chmod +x /usr/bin/bright
also suspend and hibernate are broken (blank screen), and I can't get an on screen keyboard on the startup screen