A webcam is now available on a separate page.
I used a Logitech Quickcam 4000 connected via USB. The standard pwc driver is used to connect the webcam to the operating system. To stream the video data motion, well documented application, was installed. The video stream is integrated into a separate page using the WordPress WebCam Image Viewer plugin available via Google code.
The link code.google.com/p/wpcam was the only reference I found referencing this plugin and there is hardly any other how to than the documentation in the program code itself.