has anybody else noticed, (iPodShuffle Users) that the USB plug on the shuffle has five additional contacts inside along with the normal four that USB has?

I have a USB 2.0 Flash-drive, and it only has four pins, could this be future expandability?

My personal opinion is that this is going to be something like an audio out, or could even be the "missing" controller that some people have asked about, what do you all think?