My employer has opened some R&D time and money into Beacons and the Physical Web using Low Energy Bluetooth dongles, and it seems pretty interesting. I've searched around a little bit, but there doesn't seem to be much released into the wild using this technology. Apple with iBeacon, Google with Beacons and a few proprietary implementation and some up and coming ones on kickstarter. What are you personally doing in this field?

Edit: FWIW, I'm not involved in the project or idea generation where I work, just interested in maybe doing this with a side project. This or Tensor Flow or some other Machine Learning.