I took some time over the weekend to dive into the multitouch APIs on AIR 2 and built a basic example with the Google Maps 3D API. I wired up the out of the box gestures in AIR 2 to some specific manipulations so that it goes beyond the typical move and pinch gestures that most of the multitouch mapping apps use. You can see the YouTube clip below and grab the source over on GitHub to see how easy it is to use the gesture events in AIR 2.
A couple of great places to look for more multitouch info is Christian Cantrell’s blog and Matt Legrand’s Multitouchup.com. I’m also working on an Android version of the app but there are a couple of kinks to work out.