They sure are persistent over at Adafruit Industries. After posting a thousand-dollar bounty on an open-source Kinect driver, then raising that bounty twice, they’re hard at work on their own hacks. One of the first things that needs to happen, of course, is to figure out just what language the Kinect speaks, what tags accompany what data, how to do basic things like turn the sucker on and off and give it a legit device ID.
Adafruit put a sniffer in between the Kinect and the 360, allowing it to record the process bit-for-bit. I don’t speak hex, so I can’t tell you exactly what’s going on there, but if you’re interested in seeing exactly what bits are being passed, you can download the some of their raw log files here on GitHub.