http://www.thinkgeek.com/gadgets/security/910f/
Travel internationally while keeping your identification secure.
As of October, 2006, the US state department issued rules that dictate all US passports must have embedded RFID tags. The chips are designed to hold biometric data for passport holders, but are not designed to track your movements... Or so they say...
Place your passport inside the RFID Blocking Passport Billfold, and your data remains safely ensconced inside soft black leather, only readable when you want it to be. Just like the RFID Blocking Wallet, your personal information never leaks out, and you won't have to put tin-foil down your pants.
The RFID Blocking Passport Billfold has room for your passport, and also has room for four credit-cards, your driver's license, and a pocket for your folding money. Nice!