We use them to carry car keys on our belts; we even rappel down cliffs on them. Everybody knows the quickest, safest way to attach something valuable to something else is to clip it on with a metal carabiner.

That's the idea behind Courier Clip. It's got a tough silicone case for your iPod nano, with a detachable metal carabiner, ready to clip onto your belt, backpack, handlebars, hatband, tentpole, even your climbing rig.