Found this via random google search, and I have a gen 1 that I had from 2007 when I originally started running and switched it to a gen 5 or 7 (the last long and thin one with actual buttons) which I still use. Gen 1 had been sat in a drawer but will now be getting traded for the new one.
Question though, how easy is it to operate a touch screen on your arm band whilst running? With my nike armband I can reach and feel the actual buttons for changing track and pause, but with the little tiny touch screen, will it get fiddly? Will I hit pause instead of next track?! Or will the newer headphones let me pause or cycle tracks (Pause is important for the end of a run or crossing a road...using nike+)
I ran with an iphone using the nike app once and it was a nightmare, had to keep looking down and around to see what I was pressing.
Failing that, I'll just wear the new one as a watch.... Its free so cant moan