You can also use the intrael server
http://www.intrael.com
Intrael is a small app server that provides a solid HTTP interface to
the MS kinect. It processes the depth data coming from the device,
tracks objects and provides several of their properties to network
clients. The raw outputs from the cameras are also provided as JPEG
images or MJPEG video streams. Using nothing more than plain AJAX,
computer vision can now be performed directly and efficiently in the
browser. From smart security cameras to all kinds of interactive
surfaces, a multitude of new possibilities opens up for web
development. The input process itself becomes an art. The code is very
efficient, highly portable and licenced as free software.