What if, one were to wire up the tracking motor controls on a Quickcam Orbit to drive a robot platform.?. In Windows mode, the automatic face tracking becomes automatic person tracking. :-) The Linux driver supports the pan/tilt capabilities, but I don't expect the pan/tilt is hardware-based, but that's reasonably easy to overcome in software.
Received the P.A.M. samples yesterday. Will start playing with them over the weekend.