On NXTLog, R2D2893 posted this gigantic Mecha, called Gibbous 8, whose head and arms are controlled by a NXT. Very impressive, R2D2893!
Here's another picture of the head, chest, and arms of Gibbous 8, showing the NXT and servo motors:
You can see more about this project here.
UPDATE : There is also a Brickshelf folder with more pictures here.