I'm sure that this question has been asked before, but I can't find any reference to it at all anywhere, so here it is... If I were to pay the 100 dollars to Apple in order to have my battery "replaced," would I recieve the same model iPod (3G 10 GB) back from Apple? Or would I recieve one of equal value now (4G 20 GB)? I'm confused as to what will happen as I know people who turned in their iPods and have recieved 4G iPods, but I also know people who recieved 3G iPods. What's the deal?