I think Facetime is already open. You can use it on your Mac, on your iPhone, on your iPad. Looks like this is open to Steve Jobs, open to all your iOS devices. Why would you need to have another kind of device anyway?
You make an important observation. I recall an email exchange[1] between a reporter and Jobs about "freedom." He does not define words the way we tend to define words. He defines them as a CEO in the corporate world whose company uses marketing to its benefit.
Is this fucking Scientology, where we replace the meaning of words with their opposites?! The fact that Apple is the only provider of FaceTime software and it's only available on Mac and iOS means it's proprietary. Jobs said they're going make it an open standard. They didn't. There's no third party client, there's no FaceTime for Windows or Android.