FaceTime is nothing new really, but Apple is good at making you believe that it is revolutionary. FaceTime is actually very restricted. For one thing, you need to be within the area of a Wi-Fi network and then you can only call another iPhone 4 owner, not someone with another phone.
Then again, that’s the kind of control Apple loves. The FacePlant app shows users which of their contacts can receive video calls, which saves you a lot of time. FacePlant isn’t approved by Apple, but if it ever is, it will be available for free.