There has been a Music server in MJ and MC as long as I have been around, Tivo, pod-casting, Tv support, but no webcam support.
The Other Day I Bought A New Logitech Pilot AF Webcam, And Have Been Looking For Some Decent Software To Play With.
I also looked for the Logitech SDK for there webcams (they no longer supply information or a SDK, per some information i have read).
I Did Find A Program Called "AbleCam", At First it did not work correctly with the new webcam but i contacted the programer, and worked with him to get the webcam to work with The Newer version of the webcam.
It has Many features including a webcam streaming server, Built in chat, ftp upload, etc...
It also has a follow movement option, or you can direct the webcam thru the software or via a html page.
With All the People Who Use Webcams I Am Not sure why this would not be a option.
WebCam Your Podcasts, Your Music Parties etc...
It's a very interesting program.
http://www.multicamserver.com/