When apple unveiled FaceTime, Jobs said it would be an open standard. Sadly it never came to be. I wonder why - that could easily be a competitive advantage over Skype or countless other competitors... Maybe a stupid patent (that Apple has licensed to use, but has no right to let others use it too) is the reason?
Actually I remember reading that part of the reason FaceTime hasn't turned into the open standard that Steve promised is that when he made that announcement at the event, this was the first time that anyone had heard of it being an open standard. The FaceTime team had no idea and then maybe he dropped it after meeting with them. It isn't referenced anywhere except in the video of the event and breakdowns of the event on blogs.