Brainy 1.0 is a Solarbotics Sumovore modified with the Atmel BrainBoard 1.0. The BrainBoard has a Mega8 as the MCU. I plan to replace the Mega8 with a Mega168 and 20 MHz crystal. Other than that, the only other modifications I have made are to add the silicone tires.
Brainy 1.0 also has 5 IR sensor looking for the Mini Sumo ring edge. These sensors could also be used for Line Following. I do not plan to currently enter Brainy in Line Following, but you never know.