I have been struggling with getting Elo Touchscreens working with the Debian version of Pluto and it has not been easy- mostly the driver itself is cranky. I am about to try ELO's driver as soon as I'm ready to grind through the process. (the Elographic open source driver that I finally got installed isn't talking to the screen correctly. After it ID's the hardware it goes down trying to sync.)
You can use the touchscreens attached to a windows PC running Win Orbiter just fine. But it ties up the PC. Let me know what progress you make. I can forward what I have managed to get working in Debian if you want. PM me an e-mail. If it were working I would post the process which I will do if & when.