> careful not to leap to conclusions about banknotes being a location > finder.
Not a location finder, but an origin tracer. The good think about cash is that is is untraceable. Unless there are machines that can quickly read the serials, and cheap enough to be widespread. RFID readers will have both qualities. And since it's all electronic, it can easily upload its traffic, er, somewhere for, er, further processing. -- Vincent Penquerc'h
