The Official Microsoft Kinect SDK should be easy to plug into the XNA Game Studio.
There should articles on the web and samples shipping with the SDK.
Unfortunately I haven't used the MS Kinect SDK since version 1.5. I'm hoping there are updated guides/tutorials available for the latest SDK.
UPDATE
One workaround would using multiple applications talking to each via a TCP/UDP socket (OSC is pretty easy to use for example). The idea is you use what you prefer for the kinect tracking, but send a list of coordinates for the joint's positions and orientations to unity.