Israel based Elbit Systems developed teh VIPeR (Versatile, Intelligent, Portable Robot) military robot.

VIPeR can carry a mini-Uzi submachine gun or launch grenades from a 4-ft.-long robotic arm.
The 9inch tall and 25 pound weighing robot can move in difficult terrains and also climb stairs.
The VIPeR is remotely controlled via a harness and helmet-mounted display by a human operator. Good thing this robot does not have yet a mind of its own.
Elbit Systems says that the VIPeR will be deployed by Israel Defense Forces infantry after field testing.
More details on Popular Mechanics. See also the Elbit Systems site.