Tradewind Technologies has brought RFID where RFID has never gone before: to the tip of an SD card. Their
SD-based RFID reader works with any Palm-powered handheld and can read and write many standard
and proprietary 13.56Mhz tags and labels. The company has also made a developer kit available, but don't plan on
getting it just to fool around with some hacks (unless you really want to, of course), because scanning RFID
tags with your Treo will set you back a grand.