iRobot PackBot EOD is a rugged, lightweight robot designed to assist military in combat to remove EOD/IEDs, surveillance, reconnaisance and payload (communication) delivery. why is good: this little robot already saved many lives by disabling bombs and clearing other potential hazards. price: a cool $ 200 Gs.
this robot is made by the same company making Roomba, the vacuum cleaner robot.
>> for more info check iRobot website
>> irobot website has a special section reserved to show its use for the military
you can access that information here: gisupport.irobot.com