How many touch points can I get on uTouch?

Atmel advertises 16 simultaneous touches for the following chipsets:
 * mXT224
 * mXT616
 * mXT1386

This is the highest we've heard of so far for any mobile devices besides Apple's iPad. We're not sure who's using any of these three mXT chips yet.

The design patterns for Ubuntu and touch are focused on gestures that users can do conveniently with one hand. As such, we've got uTouch configured for 1 to 4 simultaneous touches.

However, uTouch also supports raw MT data, and for specialized applications (like games) that didn't want to use the predefined gestures of Ubuntu, this is what you'd want. I don't believe there is any technical limitation for the touch data made available to application developers through uTouch. Last August, we tested uTouch and MT events with the 3M 22" monitor and were getting touch events for at least 16 fingers simultaneously, so you should be ready to go right now.

We work very closely with our community members, so if you did encounter problems, at the very least we could give you pointers. If there were changes that we could make that fit will with our tasks for the development cycle, we'd likely be able to help you out immediately.