We're going to be covering a WebRTC codelab (written by Sam Dutton at Google) at the SF HTML5 WebRTC Hack Day (http://www.meetup.com/sfhtml5/events/139666482/) tomorrow:

https://bitbucket.org/webrtc/codelab

Another good set of WebRTC resources: https://github.com/muaz-khan/WebRTC-Experiment

For STUN/TURN, you'll probably want to take a look at this server: https://code.google.com/p/rfc5766-turn-server/