Can I just say how utterly cool it is that the iPod auto-pauses when the headphone cable is pulled from the jack? The 1G definitely didn't do that and it's a very nice touch, both for the frustration of the accidental "oops, moved wrong, my headphones popped out, and now I'm missing the song" as well as the nice battery-saving implications if you've been known to doofishly not pause the iPod reliably when removing it after a walk.
