The Moshi iPouch case for iPod and iPhones is one of the few cases I've seen that's not made from leather or silicone. Instead, Moshi uses micron-sized filament lining with in-situClean technology that effectively protects the iPod from scratches and fingerprints. The pouch also has a splash-proof and anti-static finish for that extra touch.
The Moshi iPouch is available in four different colors for $23 each.
Protect Your iPod With the Moshi iPouch
References: store.moshimonde & gadgetsin