The Kinect is a 3D motion sensing input device for Windows. Based around a webcam-style add-on peripheral, it enables users to control and interact with their computer through a natural user interface using gestures and spoken commands.
You can get the Kinect SDK and drivers from Microsoft and the Delphi header files and samples from Google Code. This video was part of the Making the Connection: Programming Devices and Gadgets with RAD Studio webinar. You can view the full directer’s cut of the webinar on demand and download the code.