Youtube link for mobile viewing
Warning: Do not attempt anything you see here at home. Engaging in a video chat with one's self on a Nexus S and a Motorola Xoom while recording the endeavor with a third camera may will lead to severe confusion, nausea, upset stomach and could well end in the destruction of the universe as we know it. You have been warned.
Oh, and check out the video of video chat on the Nexus S. It works, all right.