This is a sample from the K4W community. Josh Blake, K4W MVP, built an application that allows you to play the role of a broadcast meteorologist and puts your image in front of a live, animated weather map (all without the expensive green screen equipment).
This video (part one) provides a quick demonstration of the features of the application. Check out part two which provides a quick walkthrough of the important parts of the source code. Part three walks through the important parts of the code for implementing background removal.
Full source code is published under an open source license at http://kinectweather.codeplex.com.