Further to the matter of hummingbird drones: http://www.youtube.com/watch?v=1tetyswGyGA
This one has a range of 0.5 miles and can stay in flight for 30 minutes (?). The video mentions the contract for them being in the range of 150 or so, which starts making them sound like they're priced higher than they should be, but perhaps mass production will bring down the cost sufficiently for them to become ubiquitous. If a better powerplant is found, and they can be made quiet, we will be one step closer to the "hunter-seeker" seen in Dune. http://www.youtube.com/watch?v=bIVzK-h6qao Eric
