Ogre, a LEGO Tank (video)

Ogre is a "Tank" built around a Zamor launching system nicknamed "Hailstorm". For more information, visit http://www.teamhassenplug.org/robots/OGRE/

It uses three XL PF motors, controlled either by a standard PF remote, or by the on-board (black) NXT using the Hitechnic IRLink. It also has a small wireless "spycam" attached, so that the driver can "see" what the robot sees. The result is a lot of fun to drive around, and even more fun to watch it autonomously detect, target, and destroy loose LEGO targets.