Wave was built on XMPP wasn't it? If I understand correctly XMPP is fully extensible which means Google can add whatever data they want and still be inter-opera

Wave was built on XMPP wasn't it? If I understand correctly XMPP is fully extensible which means Google can add whatever data they want and still be inter-operable with all the common parts and then define the new parts. Video seems like it could be out of band using WebRTC and initiated by new XMPP data. Watching the Wave introduction presentation from Google I/O 2009 it's hard to buy that a new protocol was needed. http://www.youtube.com/watch?v=v_UyVmITiYQ http://www.youtube.com/watch?v=v_UyVmITiYQ