"MindCuber can be seen here solving the Void Cube. It is essentially a Rubik's Cube with holes through the center of each face, which makes it slightly more complex to solve. The description on the video itself says a little more
Scientists at Cambridge University used LEGO MINDSTORMS NXT robots to automate the creation of artificial bone-like structures. Understandably, they report that NXT robots proved to be much easier to set up and vastly more economical than more high-tech solutions. Other Science Research entities have reported the same bonus this toolkit has provided over the years and its not over by a long-shot. Cambridge's NXT research aid is featured in this video for the 2012 Google Science Fair.
Dexter Industries have come out with another sensor for the NXT, this time a compass.
A compass is an excellent way of figuring out which way your robot is pointing. Especially handy for things like navigating around or playing a game of robot soccer!
This particular one can measure along 3 axis (so I guess that means heading as well as tilt?)
As with all compass sensors, you need to be very careful around other magnetic fields (power cables, motors etc) but according to the manual, you can do some calibration to reduce any offset from true north.
At $29, it's one of the cheaper sensors available for the NXT :)
More details including code samples for NXT-G, RobotC and Labview can be found here.
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