Jonathan Schwartz @ News.com has an article that will be making the rounds quite a bit regarding unencrypted information on some of the new credit cards. I fully expect our Makers to make a text to speech version that screams out names as people walk by -
"They call it the "Johnny Carson attack," for his comic pose as a psychic divining the contents of an envelope. Tom Heydt-Benjamin tapped an envelope against a black plastic box connected to his computer. Within moments, the screen showed a garbled string of characters that included this: fu/kevine, along with some numbers. Heydt-Benjamin then ripped open the envelope. Inside was a credit card, fresh from the issuing bank. The card bore the name of Kevin E. Fu, a computer science professor at the University of Massachusetts, Amherst, who was standing nearby. The card number and expiration date matched those numbers on the screen. " Thanks Sdwarf! - Link.
More:
- No-Swipe Credit Card No Problem For Thieves - Link.
- Researchers See Privacy Pitfalls in No-Swipe Credit Cards" - Link.
- Vulnerabilities in First-Generation RFID-enabled Credit Cards - Link.
- RFID Payment Card Vulnerabilities Technical Report - Link.
RFID projects, readers, hacks and more:
- DEFCON RFID World record attempt... - Link.
- Interview with RFID implanter - Link.
- RFID Robot - Link.
- RFID door - Link.
- RFID enabled flame shooting trampoline - Link.
- MAKE VIDEO PODCAST - Getting "Chipped" - Link.
- HOW TO - Homemade RFID reader - Link.
- HOW TO - Make a RFID zapper - Link.
- DIY RFID-Zapper... - Link.

From the pages of MAKE:
http://blog.makezine.com/archive/2006/10/fun_with_rfid_aka_researc.html