http://www.wirc.dension.com
It allows you to control your RC car, boat, tank, construction machine or any other RC vehicle with your iPhone using WiFi. The iPhone application, available for free in the App Store, lets you drive with on-screen joysticks or by tilting the phone, while watching the real-time video stream coming from your vehicle.
8 PPM output channels for Servo or ESC control
4 digital outputs (on/off)
4 digital inputs (on/off)