I'm also hoping someone can shed some light on how to establish USB communication between an arduino and an Adobe Air app creates using actionscript3. I haven't got it in me to learn yet another language in order to code android apps! Flash might not be the best way to create android apps but it works and I have a list of projects as long as my arm that I could implement tomorrow if I had this missing link.
eg - a panoramic unit that runs from the android device and uses its in-built camera to take shots as an arduino controlled pan/tilt mechanism rotates the device around.