How about an RFID reader (maybe even writer)?
Maybe even an OpenPCD (http://http://www.openpcd.org/) clone? (13.56Mhz Card Reader) and its counterpart, the OpenPICC (http://http://www.openpcd.org/openpicc.0.html)? (13.56Mhz Card Emulator)
The only web shops are in Europe, and from what I can tell, you're paying European premiums (and probably even VAT tax on it.) I'd love to be able to get these from Seeed.
Hi Shadyman,
If you are interested in a cheap very versatile RFID (13.56Mhz) Read/Writer/Emulator you can read the thread about my TRF7970A Breakout board which even work basicly (to read UID) with a BusPirate.
The link is here http://http://dangerousprototypes.com/forum/viewtopic.php?f=19&t=3187
Best Regards
Benjamin