I don't think there is one yet. Just this slide showing that they're using a bunch of VOIP protocols to implement it: http://www.blogcdn.com/www.engadget.com/

I don't think there is one yet. Just this slide showing that they're using a bunch of VOIP protocols to implement it: http://www.blogcdn.com/www.engadget.com/media/2010/06/apple-wwdc-2010-384-rm-eng.jpg http://www.blogcdn.com/www.engadget.com/media/2010/06/apple-...