His latest entry details the gesture recognition library that he's put together for Kinect. Excerpt:
To get an application to interpret the events directly, I implemented a focus model for controls very similar to keyboard focus. When you press a key on the keyboard, the system sends the events to the control with focus. It’s no different with Kinect gestures. To focus on a particular control, all you had to do was point at them (I’m using past tense on purpose… I’ll get to that story later).
If you are among the many developers who follow the IdentityMine blog, we highly encourage you to check out Evan's post about Gesture for Kinect.