AT&T finally does something with its Project AirGig wireline internet thing

Project AirGig is a novel initiative from AT&T in which public power lines are used to guide millimeter wave data transmissions.
AT&T has been banging on about this for a while and at the start of this year took the brave step of announcing ‘advanced discussions’ on the matter. In hindsight even this claim seems to have been excessive since there has been radio silence (pardon the pun) for the 11 subsequent months.
Until now! Actually there seems to have ben one trial in that