Interesting, I need to check this out. Some cafes and retail stores in Seattle this week will begin individually marketing products and services to bypassers in Seattle using RFID (radio frequency identification) technology. The first target group is visually and hearing-impaired individuals who can benefit from positioning and navigation applications added to the system. Other possible applications might be for tourists who might want guidance in the downtown Seattle area… Data about the customer can be mined and sold to the retailers, Donohue said. It can also be used to personalize marketing and map customer behavior. Link.