I use my current Nano exclusively for running. I can carry a bunch of music (or audio books, or podcasts) in a device that, for practical purposes, weighs noth

I use my current Nano exclusively for running. I can carry a bunch of music (or audio books, or podcasts) in a device that, for practical purposes, weighs nothing. I can use the built in clip to attach it to a shirt edge, or just put it in a pocket. Neither of these modes of use are possible with my iPhone. I really, really hate armbands for iPhone running, and my iPhone bangs about in a crazy way if I run with it in a pocket.