Just did an entire line using their 19" touchscreen touch monitors along with the Foxconn Nettop PC I mentioned earlier. Got the Penmount driver working under Ubuntu without a hiccup.
Unfortunately, I had to go to XP because I was having issues routing through the wireless connection to the hard-wired PLC connection and keeping it stable-- admittedly the problem was probably between the chair and the keyboard on that one! 
Aside from my infrastructure issues, though, I was very pleased with this setup under Ubuntu-- and I was able to put it together for about $1280 each! 
Monitor: $990
PC: $170
2Gb Memory: $30
32Gb SSD: $90