MakerLegoBot

Below is a recently uploaded video of a MakerBot made out of Lego which can assemble Lego models from a software description.

A full description of the model can be found at http://www.battlebricks.com/makerlegobot
The current design works with 1x2, 2x2, 3x2, 4x2, and 8x2 stud Lego elements. Sweet.

Ogre, a Lego Tank

Here is a neat video of Ogre, a Lego Tank that I found on YouTube. It can be controlled remotely or can work autonomously.

Fantastic invention.

ARM powered Lego 4x4x4 cube solving robot

Here is a nifty Rubik's 4x4x4 cube solving robot made of Lego. Well worth looking at