We're cheap, we travel in gangs, and we're coming
From multiple sources, including the June 14, 2004 issue of FORTUNE magazine:

On the frontier of artificial intelligence, mobs of cheap robots collaborate like ants in a colony or bees in a hive....

"Imagine if you could convince a bunch of robots to act like ants, and further convince them that they really like land mines," observes James McLurkin....

He is a senior lead research scientist at iRobot....the company is best known for making the Roomba floor-vacuuming robots. But iRobot also does contract research and development like McLurkin's Software for Distributed Robots project, which is funded by the Defense Advanced Research Projects Agency.

Military brainstormers think that scores or hundreds or even a few thousand cheap robots working in concert may play an important role in future operations such as land-mine disposal or taking over buildings held by bad guys....

Insects make great conceptual models for cheap robots because they have simple local interactions with one another that nonetheless add up to very complicated group behaviors....iRobot's SwarmBots are cubes measuring five inches on each side. They have rechargeable nicad batteries and a pair of electric motors inside, along with a microprocessor and some associated circuitry. A "bump skirt" helps the robots sense and avoid crashing into obstacles. Each has a small color camera for simple object recognition, as well as sensors that detect light. Communications between robots are handled by an array of infrared transmitters and receivers....

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