For a school project, my friends and I are trying to figure out how to turn the iPhone into a RC car remote controller. Most of the projects I have seen so far route signals through a laptop. We want to do this without the laptops. One se up I have seen is this: http://ouch-ouch-ouch.blogspot.com/2008/09/ipod_18.html where two Xbee modules are attached to the iPhone and the car. My friend has suggested attaching Bluetooth to the car but I've heard iPhone Bluetooth is pretty crappy..
I'm a complete noob when it comes to arduino, xbee, etc... but it seems like an incredibly fun project to undertake. If anyone has any suggestion or feedback, it'd be much appreciated.