BentoBot is a robot designed to compete in a Mini Sumo competition. It uses a Zumo chassis, 100:1 micro gear motors, and a TB6612FNG motor controller. Here is a video of BentoBot competing at the 2012 Atlanta Hobby Robotics Club Robot Rally:
See this forum post for more pictures and information about BentoBot.
Featured link: http://forum.pololu.com/viewtopic.php?p=29649#p29616