Check out this video from a group of National Instruments engineers who rigged up a remote controlled car with an iPhone as the controller.

NI press rep Trisha McDonell tells me there are practical uses for this project: “these applications can help in autonomous vehicle research which are used in rescue missions.”
Looks to me like these guys are just having a ball taking texting and driving to a whole new level. DO try this at home, they say. Just don’t sue us if you run yourself over!