Camera on Windows Phone?

I have been trying to get the camera to work for Windows Phone 8 with the UserMedia object. Any hints at the correct way to use it, or if it is even supported, are appreciated.

As a test, I added the UserMedia object to my project and said to request the camera on load complete. I didn't received any security request. I tried just saying make the camera visible instead, and still just get a black square.

I do have the camera enabled in the Capabilities section of the Visual Studio manifest before testing.

Thanks,

Steve