We all know the deal with battery life and the number of charges. I'm worried about all this plugging the phone in the car to listen to iPod music then unplugging only to plug back at the office to sync with Outlook, to then unplug and plug back in the car, etc, etc. How are all these little bursts of charging everytime I connect the phone to a USB port affecting my battery? Am I going through those famous 400 charges like a madman? With my old phone I was used to charge the phone only when the battery was drained. I still do this with the iPhone; nonetheless, I would venture to say that everytime I plug the iPhone to a USB port for five minutes (where it charges by default) I'm somehow affecting battery life and performance... Your thoughts would be greatly appreciated!