I love my iPhone. But I also love my iPod, and when I'm using my iPhone as an mp3 player, the button on the headset's chord is a lame replacement for the iPod's wheel. I miss the ability to move back in my playlist and I don't want to open my iPhone holster each time I want to increase or decrease the volume. I often pause music instead of moving forward because I did not click fast enough on the chord's button. I'd love to see Apple release an accessory looking precisely like an iPod Shuffle, or even better with a iPod 4G wheel, connected to the dock connector of my iPhone, with a jack for the iPhone headset...