Just finished beta version 1 of a General Purpose In/Out daughterboard for the Microtouch, and thought that people might want to see it. I decided to utilize the MicroSD card slot to run SPI data to a second atmel processor (an Attiny2313), and handle the in/out there. Current demo is a Microtouch Application with 6 buttons that turn on and off LEDs. Pretty basic, but a start, and I will post all the code/schematics under some creative commons license soon, to make it OSHW-compliant. Video and more description here: http://hjohnson.posterous.com
Constructive criticism is welcomed, thanks!