This robot was submitted into the NXTLog sumo challenge and was selected as the 30 finalist to be battled. Sumo Mantis made it to the top 10 finalist.
Now about the robot.
This was my first sumo bot ever and it turned out very well. The two claws could get under about anything. And once the touch sensor was pressed, the claws would lift catching the opposing robot, then it would dump it off at the edge.
You can find my program and LDD file at http://mindstorms.lego.com/en-us/Community/NXTLog/DisplayProject.aspx?id=7400c7ab-eae5-4216-84d7-e4d3a9167037.
I Created a test sumo board to see if my robot worked, and created a decoy for it to attack.