I also use it to talk about pictures like this one:
It's a tiny camera inside what is ostensibly a maple seed. But instead of free-falling, this thing has jet boosters--jet boosters!--to keep it in the air while its wireless communications equipment sends data back to its controller. Apparently the military will be using it to monitor hostile territory, scout out enemy troops, and detect chemical or biological weapons.
I wouldn't be surprised if individuals on the CIA watch list find their houses bombarded with maple seeds.
(image from CNET's Crave Blog)