The World's (2nd) Fastest 3x3x3 Rubik's Cube solving robot (For an unmodified cube) , Built using 4 x LEGO Mindstorms NXT kits (with some additional LEGO pieces) and a Samsung Galaxy SII smartphone.
CubeStormer II held the Guiness World Record for a Robot to solve a 3x3x3 Rubik's Cube which was 5.270 seconds.(including the scan time)
This record was broken again on March 14th 2014 By its successor Cubestormer 3.
Since then Guinness World Records have allowed the cube to be modified in a way which allows the cube to be turned from its centre square so the robot no longer needs to grip and manipulate like a human solver.
Also the robot does not need to scan the centre colours if you are allowed to start the process with the cube in a fixed orientation. (that is human intervention in my view).
The machine was created by me and was programmed by David Gilday who also developed the two-phase algorithm which finds close to optimal solutions in milliseconds and choses the most efficient solve for the machine's four grippers to manipulate.
See more LEGO robot Rubik's Cube solvers at;
http://www.youtube.com/user/IAssemble
http://www.youtube.com/user/ARMflix