@richard came across this awesome 3D printed aerial tram project by Printrbot founder Brook Drumm:
We want to install one at MakerHQ, but take it to the next level! The idea is to build a track around the top of MakerHQ but add self charging capabilities! The idea is to wrap 2 sections of bare copper around a spot on the track that line up with the pulleys and use those as the charge connector, and put slip rings into the pulleys so they can be wired back to a charging circuit. The tram would detect when its getting low on power and then head back to the charge location.
Who wants to get in on the fun?!