I have Hass running on an RPi3 at home, not doing much at the moment though.
Hardware
RPi3 type B
Software
I'm running Hass.io because it's easymode.
Beaconing
General notes: https://www.home-assistant.io/blog/2016/04/30/ibeacons-part-1-making-presence-detection-work-better/
So it can do some interesting things, but it's especially good for presence detection and the like.
There's a bunch of libraries for supporting it in various forms, etc: