Aluminum is for foil. Stainless steel? Barbecues and razor blades. The only metal truly worthy of armoring your precious iPod Nano is titanium.
The "Re-Nano Factron" case by Kiwami Studio is made of the ultra-hardened substance, the type that's been used to protect everything from battlefield spy bots to keyboards and USB drives that can survive being run over by a car in the snow. Engadget says it's available in Japan for around $818--or about five times more than the Nano itself. Now that's what we call commitment.