which USB touchscreen display works in ubuntu with beagleboard

Hi all,
Which are those touchscreen display (small display panel) are supported by beagleboard in ubutnu.


Its not USB, but its still a very nice touch screen; maybe a little
pricey though..

FYI, it won't fit the XM yet; it works on the C4 and lower. I've asked
their plans for the XM but so far no answer.

Thanks,but i am looking for Low price and works in ubuntu .