4WD WIFI CAR HELP !!

I am wanting to build a 4wd wifi car, remote controlled by the Iphone App (RCTx or TouchOSC). The the car has to be only controlled by the Iphone and not by any other device or via a pc.

I have seen these shields for the Arduino Uno, Cupperhead, Wishield, Hydrogen Board and Wifly. Does anyone Know the best one to use?

Also

I can't find any supplier in the UK that sells any of these boards, can anyone suggest a supplier in the UK or anywhere cheap to buy these boards?

try adhoc connection instead of infrastructure.

If this answer is rather vague, please reread your question