Thanks to sirmaru and jgaiser for the news and the link.
It is interesting but how practical?
How will they deliver to apartments and office buildings so the right person gets it. Perhaps they could land it on your balcony but how many office buildings have balconies?
Plus if it worked out as financially viable soon UPS etc would have them and the skies in major urban areas would be full of them.
I also think they could be hijacked and reprogrammed and used in a bad way, but maybe I am being paranoid
Helen