Steve Ballmer announced at CES that official Kinect support for PC and the Software Developers kit will be coming soon.
XBox Kinect running on OS X ( with source code ) from Theo Watson on Vimeo.
Hackers opened the controller device to make it run on both Windows and Mac OS X. Here's some Video footage released of the device controlling Windows 7.
The support for 3D gestures will allow PC owners to benefit from the success of the Xbox 360 launch.