There is significant discussion on hack-a-day and adafruit (more in blogs currently than in forums. Only a couple people have the kit.)
http://hackaday.com/2011/05/11/official … n-arduino/
http://www.adafruit.com/blog?s=adk
One of the Adafruit references is for a site with instructions on how to run the software on standard Arduino hardware (MEGA + USB Host Shield), which is especially significant since the official kit is 1) sold out, and 2) very expensive (~$400)