Have you ever locked your keys in the car and you are going to be late for a very important meeting?  What do you do?  You whip out your iPhone and you call your car and have it open up the doors and start up before you even sit down.  How is this possible?  The Viper Smart Start.   The power of having a portable computer in your pocket.   And even though the car starts without the key in the ignition, it will not go anywhere until a key is put in the ignition.  What other applications will be written for smart phones that can come in handy?  And, no, the Viper Smart Start requires a $500 reciever to be installed in the car, so it is not free.  But, it is pretty cool.  Any other apps out there that work on the smart phones that control other electronics that you like?