Hi pd,
WPTouch doesn't support custom post types. It's not app themes, it's the plugin. WPTouch says they are working on it. It may be a while though. I tried to modify a different plugin called Mobile. It's tricky because the smart phone plugins use their own themes!
I replied to this earlier today. Guess it didn't post. Hope this one goes through.
Ciao
Make everything as simple as possible, but not simpler. - Albert Einstein