Hey,
I've worked with the guys at with making my game work with their tiltControl device. It's a module that plugs into the bottom of the PDA and allows programs to sense the tilt and acceleration of the device.
It worked well with my game - since it's based on gravity to begin with. And maybe something you're working on could use it as well. It was very easy to incorporate it into my app, although I did need to modify pocketFrog since it sends data via the window message handler. If anyone is interested, I can post the mods.
Jason
