In what has to be one of the strangest, but potentially quite practical, iPod accessories, you can buy a tie designed to hold an iPod nano on the backside. If you have never seen a nano close up, they are extremely small and very light, so this would actually work pretty well. And it looks like the tie would match your Nike/iPod sneakers. To trick out an entire ensemble, you might want to finish up with one of the jackets with a solar panel on the back so you can charge your iPod from the sun while you are walking in your Nikes.