IPhone – Can you video your facetime chat

As for your question, Is there anything new that hasn't been done before, then one could be generous and say that the no-account-required and it-just-works is quite nice, as is the elegant use of front or rear cameras and the ability to switch between them, and the automatic landscape/portrait modes. That's quite slick. But it's not a competition-killer.

On the whole, Facetime is the typical Apple feature -- very polished, but a limited feature-set, and only available to users on the exact same platform (in this case, only iPhone 4's, iPad 2's and Macs). That alone limits the usefulness of the app quite a bit.

For general-purpose video calling, there are general-purpose apps like Skype which do it better, and which even work over 3G (if you're lucky), and which aren't limited to specific Apple-only devices.

I'd recommend Skype over Facetime any day.

(Notice I didn't comment on the revolutionary issue either.)

Yes to all of your questions.

The Jailbreak app My3G tricks your iPhone into thinking it is on WiFi, enabling you to use FaceTime over 3G.

Source: http://www.macrumors.com/2010/08/02/facetime-over-3g-comes-to-jailbroken-iphone-4s/