New CU-RTC-Web Prototype – Roaming
The crew at Microsoft is forging ahead with their “CU-RTC-Web” specification as a counter proposal to the new WebRTC / RTCWEB proposed standard in the W3C and IETF. My colleague Robin Raymond and I certainly align with Microsoft on some issues, more specifically around SDP but it would have been good if this work took place inside the IETF.
I really can’t see Microsoft changing their tune anytime soon, which means that Enterprise web application developers will likely need to support both WebRTC and CU-RTC-Web if they are to be a plugin-less solution enabling RTC across all browsers. Not ideal.
WebRTC.is 
Your post raises a couple of important points. CU-RTC-Web contributes a set of proposals for the eventual W3C WebRTC standard, which is a part of the ongoing discussion in IETF. The W3C process requires that multiple implementations of a standard are demonstrably interoperable before it achieves formal standardization. More details are available in our FAQ here – http://html5labs.interopbridges.com/prototypes/cu-rtc-web/cu-rtc-web/faq
Mark Gayler
Microsoft Open Technologies, Inc.