This genie of Kinect modification is never going back in the bottle. Now a modder has figured out a way to get the Microsoft device to work with a PlayStation 3.
This is Shantanu Goel, and his code is in a pre-alpha state, but you can see him navigating the Xross Media Bar, starting Killzone 3 and even playing it using a Kinect. Goel says his work needs some fine tuning to allow for better motion tracking, but there's no doubt about it - that's a PS3 and Kinect living together in perfect harmony.
The source code, instructions for installation, compilation and configuration are all at the link, if you're into this sort of thing.
Video of Microsoft Kinect Working with PS3 - Source Code Released [PSGroove, thanks Jeff]