Earlier I had posted about Microsoft helps in hacking Kinect to control Windows 7 where Video of Kinect giving Windows 7 Minority Report Treatment was shown.
Now many more hacks are coming up, check out these cool Kinect hacks -
A little application providing a full minority report interface.Hand detection software, along with the piano interface. The hand detection uses PCL (Point Cloud Library) from ROS (Robotic Operating System) which was developed by the folks at willow garage.
Kinect Skeletal Tracking
Kinect Minority Report Interface -
Here are some demos on Kinect hand and finger tracking -