Just as an FYI. I was able to get the ucb1400 from the audiostix to function as both the
sound controller and a touch screen driver under Windows CE. I added another small
connector to the audiostix and wired up the AC97 and power pins then brought it to
my breakout-gs AC97 interface. The breakout board also has the LCD display interface.
The audiostix was outboarded and not part of the Gumstix/netMMC/breakout-gs stack.
This was rather kludge and fragile but it worked. 
I added the other small connector on audiostix for the touch (x-y) interface.
I still have problems with the calibration but I don't think it has anything to do
with basic hardware setup.
Wouldn't it be great if someone would build a LCD interface board! It would be pretty
much a audiostix with added LCD and other breakouts.
 
DV