Is this cool or what? I can think of MANY times in my life where I wished I could remotely start my car so that in the freezing weather I could just run and jump into my totally warm and already thawed out car! I love that that have made this an app now so that you can just add that to the list of functionality for the iphone. Functionality, however, does not come cheap! The Viper System is right at $500! Dang! Available Now at Best Buy!
Here are a list of features for smartstart:

• Lock/arm
• Unlock/disarm
• Remote car starter
• Trunk release
• Panic or car finder

and the beauty of that is you can program multiple cars so when you and the spouse are somewhere and get locked out of the car, you are all good as long as you have your phone on you!