I have a Gigabyte TouchNote T1028X that comes with Intel Atom N280 and eGalax Touch Screen. It runs Ubuntu 10.04 flawlessly except touchpad and touchscreen.
Hereby, I wrote a tutorial to overcome these problems. Here you are.
By the way, if there is any touch screen laptop or netbook that not using eGalax, please report here and also attach the printout of "lsusb". Maybe I can give a hand to solve the problem.
Or, anyone's touch screen devices can run Ubuntu 10.04 perfectly, please also report here with the result of "lsusb" and the brand name, model as well as the howto.