Travelers are already adept at carrying credit cards, ATM cards, phone cards and hotel key cards. Now there's another piece of plastic to pack: the coded card that opens RoadWired's innovative KeyCard Luggage Lock. The sleek little lock secures suitcases without the need to carry minuscule keys or remember a combination. In fact, because the lock has no keyhole or dials, it's unclear how to open it. Only the initiated know it works by slipping in the wallet- or key-chain-sized key card.