Ideum, a design company specializing in museum work, developed and sells a library for detecting multitouch and gestures for Flash Professional CS5 and Flash Builder 4.0. Called GestureWorks (see http://gestureworks.com), the library supports all the gestures we have discussed thus far.
GestureWorks provides unique gestures such as flip/flick which calculates acceleration, 3D tilt, and a multitouch gesture scroll. It also supports continuous transitional and concurrent gesturing, which means you can use multiple gestures, such as move, rotate, and scale, simultaneously.
GestureWorks also includes a simulator for testing touch-based interactions within your application if you do not have ready access to touch-based screens. This should facilitate a quicker and smoother development process.
Lastly, GestureWorks comes with many examples, including a Google Maps example which demonstrates the expected gestures when manipulating a map. This will give you a head start if you are interested in applications using geocoding.