Facebook Tests Bluetooth ‘Beacons’ to Feed Users Local Content - Digits - WSJ

Not limited to beacons; see Introducing Place Tips in News Feed (Facebook Newsroom) for more details

"Facebook Thursday said it would begin testing a service to deliver information about shops and landmarks to users who are nearby, in part by using localized transmitters known as “beacons.”

The service, “Place Tips,” is a new and potentially powerful new wrinkle in the concept of digital presence, fueled by the ubiquity of smartphones that can continuously broadcast a user’s location. With its 1.3 billion members, Facebook could expand uses for beacons, which so far have been mainly used to send promotions and ads to people in and near stores."

Facebook Tests Bluetooth ‘Beacons’ to Feed Users Local Content - Digits - WSJ