AHuxley's Journal: Apple's Facetime Open standards, closed link?

Was just reading http://herot.typepad.com/cherot/2010/06/iphone-facetime-protocol.html that links to
http://www.packetstan.com/2010/07/special-look-face-time-part-1.html
http://www.packetstan.com/2010/07/special-look-face-time-part-2-sip-and.html
http://www.packetstan.com/2010/07/special-look-face-time-part-3-call.html
The "client-side SSL certificate, giving Apple the ability to grant or deny access on a per-device basis" is known, but has anything changed with the new touch?