Dave Morris shows off the HP Elite webcam. This little bugger ($60?) does face-tracking and auto-zoom/auto-focus.
The audio on this demo is with a pro mic, however. Not sure what you get on the webcam
Update: I misunderstood. Dave says the audio was recorded with the webcam’s on board mic.
Side note: I’m surprised the Blogger video didn’t offer option of embedding. Perhaps Dave simply didn’t have that enabled.