Yes; vaguely... there was some (string) message format that you could manually stitch together with the right IP and port, etc, and basically tell the browser's WebRTC implementation "other client is on this IP and port". I seem to have deleted this code unfortunately, the only thing I saved is this link:
https://github.com/cjb/serverless-webrtc/
EDIT:
Aha! I based my code on: https://github.com/js-platform/node-webrtc/blob/develop/exam...