I finally got a touchscreen added to my 12.1 LCD from EarthLCD. The touchscreen is from ELO Technologies and it works very well. The only thing is that they don't have MacOSX drivers yet so I have to wait.

There is another company called Trolltouch that will have OSX drivers if anyone is interested.

The installation was tough and a couple of steps are of the "hard to turn back" kind. In general it went smoothly and it fit my enclosure very well.

I am working on a web site to show off my setup which is almost done.

Thanks to all of you for ideas and inspiration.