Remote control start is so 2010.
First off, let me preface this entire post by admitting that I am a "Jeep guy." I eschew modern amenities like a functioning heating/cooling system and gas mileage above 15 MPG for necessities like the ability to drive over rocks. With that said, I think this project is awesome for anyone who has a car, SUV, truck, or Power Wheels - the JEEPuter.
The JEEPuter, created by SparkFun customer Eddie Zarick, is a Jeep Wrangler that has been hacked with an Arduino. By building a custom interface, Eddie has the ability to control many features of his Jeep all from one well-designed platform. For example, when Eddie gets in his Jeep, he simply punches in a number on a keypad and the Jeep starts up.
From a small control module mounted above his windshield, Eddie can control things like interior lights, exterior lights, his garage door, his garage lights, and his CB radio. Eddie did a great job of design and implementation of this project and it is a great example of seamlessly incorporating your project into its environment. The JEEPuter looks like it truly could have been a factory option. For more information about the JEEPuter and Eddie's other projects, visit his website. Awesome work, Eddie!