Quadrotor swarms
http://boingboing.net/2012/02/01/toy-sized-quadrotors-flying-in.html
An impressive swarm of small bots. I see so many EP possibilities for these...
An impressive swarm of small bots. I see so many EP possibilities for these...
And real life ones too
http://www.nytimes.com/2012/01/31/opinion/drones-for-human-rights.html?_r=1&ref=opinion
Of course the opposite side as mentioned in your link can use them too 
The important caveat about that swarm is that they don't do their own mapping of the volume they're navigating. Instead they use several large and expensive cameras position around the room for navigation and tracking.
Instead, they give the drone vision problem to another research group:
http://www.youtube.com/watch?v=WoMrPKCpWXw
Note the title card, first author is the same but the second and third are different. It looks like their lidar test system is too large for their smaller quadrotors. So they do the sensible think and separate the two problems. Either way, when they bring it together they'll be more than capable.
(insert The Birds reference here)
There is TED talk about these robots if somebody is interested. Not much anything new...but if you skip to 15 minute you will see an amusing musical performance by a swarm.
http://www.ted.com/talks/vijay_kumar_robots_that_fly_and_cooperate.html





That is simultaneously incredible and fucking terrifying.
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