philip, maybe, but that would def be a battery sucker.
When I think of wifi in photography, I think of a studio where a photographer has the camera on a tripod, and probably hooked to a secondary flash system. afaik while cameras have USB, none support direct transfers over it when the button is pressed. If the wifi supports that, then I can see it being nice on studio SLRs.
That said, why its on a gimpy 3x consumer camera I'll never know.

IMO setting up the wifi is much harder then a card reader.