Why would the iPhone have a mini usb? I like it better that it is a universal plug between my iPod and iPhone. Apple does things different, remember that.
Apple does things different from most other vendors but all too much like Palm.
Apple devices do not use standard adapters like mini-usb, for the same reason that Palm does not. So they can keep the nominal price low while inflating the system price.
You like that the iPod and iPhone have the same adapter? Except, of course, they do not. Even the iPhone and the iPhone 3G do not. My iPhone complained when I tried to use it with cables for my iPod and my 3G will not work with cables from my iPhone. All of this is about selling proprietary accessories.
At least Palm changed from one non-standard cable to another when it changed phones so that one would not get confused. Apple cables all look the same but do not work the same. That is what all those extra pins are for.
To the extent that Apple acts like Palm, I do not like either of them. If Apple takes any other lessons from Palm, it had best be careful that it does not end up like Palm. Palm failed not because it had shoddy products, but because it had shoddy business practices.