A great new product is the RFID Blocker Credit Card Sleeve  http://www.americangreenwood.com/UI/ProductDetails.aspx?mcid=36&pcid=36&ccid=143&pid=942

Many credit and debit cards, enhanced drivers licenses, etc have a RFID (radio frequency identification) chip embedded in the card. This chip contains personal and account information necessary to complete transactions. Identity thieves can merely pass you on the street and download your personal data. Our RFID blocker sleeves are made using a patented process and special alloy to protect your data. It is FIPS 201 Approved. All RFID blockers are printed in full color to communicate your high impact message. Perfect for retailers, financial institutions, government and travel agencies, schools, colleges and more!