[niles] has refined the art of making wallets out of game cartridges. Specifically, he is using Atari cartridges. He’s gotten down to about a two hour process which results in a decently usable wallet. We’ve seen someone make a cartridge wallet before, and we have to ask the same question; who wants to carry this around in their pocket?

http://hackaday.com/2009/06/12/atari-wallets/