In addition, retail is not the only way RFID can be used.
It can be used in hospitals to ensure the proper patients recieve the proper treatments, or to ensure that medical samples are anonymous and correctly associated with the patient.
Today, RFID labels are used to label medicine for the blind, which they can read with a special reader.
Assembly lines use it so that while an item is being produced, each station can do the procedure needed for that individual part.
Highway automatic toll booth collection? RFID already in action (although it is an earlier version, not exactly the same as the tags you are talking about)
There are many more uses outside retail.
--Mike
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Michael Patterson, Open Tag Systems
http://www.opentagsystems.com/