This is a must-have accessory for the music lover who can't stand to be apart from the iPod but doesn't have any pockets. The "iStik" is a plastic case with four magnets that attaches to a corresponding set mounted on a plastic plate that goes underneath your clothes, so you can literally wear the player.
How much of a demand is there for something like this? We have no idea, but it's probably not a good sign that the iStik is available only for the second-generation Nano, as iLounge says. You could also get a case with an armband or clip, of course, but that would be too easy. Just be careful where you place it if you have a pacemaker.