iSpykee

Spykee is essentially a remote-controlled wi-fi webcam that you can drive around, similar to an R/C car.

iSpykee is a free open-source application and service that lets you control and interact with your Spykee wi-fi robot from anywhere using your iPhone or iPod Touch. In order to use iSpykee, you need a Spykee robot. (Buy from Amazon: Erector Spykee - The Spy Robot)