I heard some time ago that Theory 11 was also working on a wallet concept... Interesting but not practical because it won't protect your cards at all.
I rarely protect cards in my pocket anymore - but that has a lot to do with the fact that I usually carry cheap, easily-replaced cards such as Bicycle Standard, Bee or Tally Ho. However, the thought of using it as something to which to attach my wallet is a little ridiculous. Especially when you consider how much STUFF I carry in my wallet! Actually, that's "in my two wallets", now that I think of it - I carry an aluminum hard shell wallet for holding RFID-equipped bank cards and business cards. The business cards don't get crushed and the bank cards are shielded from being skimmed.
I'm telling you, the guy that dreamed up attaching a radio chip to a bank card should be drawn and quartered. As if it wasn't easy enough to steal someone's identity and commit fraud...