BlueCasting

New Scientist Breaking News - Billboards beam adverts to passing cellphones:
"New billboards and advertising posters that use Bluetooth can beam video ads direct to passing cellphones.
As people walk past the posters they receive a message on their phone asking them if they wish to accept the advert. If they do, they can receive movies, animations, music or still images further promoting the advertised product. See Coldplay example by Filter, UK."