This is another craze I don't get: wallets available in Stainless Steel, Aluminum, Duct Tape, or some other non-wallet-like material. (What ever happened to good, old-fashioned pleather?) They even have wallets that allegdly shield their contents from RFID scanners. I know not everyone shares my opinion of these items; in fact, read Chad Perrin's TechRepublic post "Stainless steel wallet review: Two years later."
Image courtesy ThinkGeek.