I just completed my first robot project. It's based on a dsPIC33FJ32MC202 DSP. I used the Tamiya track kit and dual motor gearbox for the vehicle base. A L298 bridge controller was used to control the motors and a Sharp GP2D12 mounted on a RC servo was used for ranging and navigation.
The Motor Controller Board:
The dsPIC33FJ32MC202 DSP board:
Boards Mounted on Chassis:
I'll post video as soon as I make one.