Well you can always get the new Sprint 4G phone!! The videochat gizmo in that one will work without the need for WiFi. Of course it doesn't appear to work quite right because too many people trying to use it...hahaha
http://www.engadget.com/2010/06/07/qik-admits-evo-4g-launch-problems-after-20x-increase-on-server-d/

Videochat has been my dream since I was 3years old and saw a dick tracy comic book. You'd think that by now we'd actually have something that..uhhh..ya know..worked!

>Just another reason that I will not consider an iPhone when I get my new phone this fall.
>
>>So the fine new IPhone is coming out - best new feature? The front facing camera for live video chatting! How did AT&T screw it up? The video chat don't work on their network - wifi only!!! I KNEW IT!