Via @annevk:

http://dev.w3.org/2011/webrtc/editor/webrtc.html#identity-provider-selection

Mozilla intent to implement

The API design doesn't make sense to me, and perhaps we could help with that, but I think that's a lesser concern next to the idea of an entirely new identity primitive. This is worth us all understanding and making sure it fits well with the rest of the platform.

I need to do a lot of reading to really get this. The Mozilla intent to implement gives a nice one-paragraph overview, but the entire WebRTC world is pretty far outside my area of expertise. Any help would be welcome.