I have the same function with the ipods that I have - has been available for a couple of years or so now - built into the earphone cabling. For the record, I've never carried an ipod whilst listening to it and always been able to FF, RW, skip tracks, pause, stop and adjust volume - all with the ipod in my pocket or clipped to a suitable place.
Don't disagree with your other points though - to me, the ipod offers convenience but it absolutely isn't the ducks nuts in all aspects.
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