Huge Pneumatic Robot Arm

This Pneumatic Robot arm manages to lift a filled glass cup to a different location by following a black line.
It is composed of:
7 Motors (NXT and Power Functions)
1 NXT
1 RCX
 Pneumatic Gripper 

NXT biped from China

Here's a good biped robot built by the Team of the Chinese blog cmnxt.com

NXT High Noon Duel

A simple and fun game. You can play to test your reflexes or play against a friend.

Cool robots from Festo HQ

These are robots made by the German Company Festo
And yes, they are real



Not NXT but it may give inspiration to build something

NXT bowling

Here are two examples of bowling alleys with NXT
I like the way they set up the pins after being knocked down