Doomsday Button iPod Nano Skin
This is my personal favorite in the Nano line.
Slap this skin on, clip it to your shirt and watch the crowds disperse as you walk by. There's just something about a person that has an ominous button strapped to themselves.
Our skins are meant to make your stuff look cooler, not make them bomb proof. So don't go flashing them around in the bad part of town and skipping them across lakes because they do not grant your electronics super-powers.