I've been wanting to build this exactly since I've learned about webRTC. Extremely well done, major props!
Hi Michelle,
We just built a cloud phone on top of WebRTC. We would love to have peoples feedback on it and we just released it on Chrome Web Store today. https://chrome.google.com/webstore/detail/beepe-phone/hcfncmkiaffeiicmpkaajdibigffgnfc
You can also visit us on Chrome or your Android Chrome browser at http://beepe.me