It’s a big week for Facetime with the announcement that in iOS 6 (coming Fall of 2012) Apple will allow Facetime calls to be placed not just over wi-fi, but also over cell phone calls. From Apple:
FaceTime now works over cellular networks as well as Wi-Fi, so you can make and receive FaceTime calls wherever you happen to be.4 You can even make and receive FaceTime calls on your iPad using your phone number. That means you can use FaceTime wherever you are, on any device. And never miss another wink, smile, air kiss, or eye roll.