It seems like Microsoft Kinet is already jail breaked (hacked) to work on Windows 7. It should not be impossible as Kinet is originally developed by Israeli company PrimeSense and Microsoft bough it and used it for XBox 360. Secondly it is Microsoft and you can easily find a hack to work things around.
This is what Microsoft says about Kinect.
"Microsoft does not condone the modification of its products," a company spokesperson told CNET. "With Kinect, Microsoft built in numerous hardware and software safeguards designed to reduce the chances of product tampering. Microsoft will continue to make advances in these types of safeguards and work closely with law enforcement and product safety groups to keep Kinect tamper-resistant."
And the following video shows that Kinect is hacked to use with Windows 7. If this is true then it is pretty much can be used as any other interface.
