The F2.5 version has a cleaner design, we are using two modified servos to work as DC motors as you can see in this tutorial, the motor driver is an ardumoto, and soon I will upload more photos with new addons.
Farrusco Junior is another iteration, he has two modified servos and a small chassis. The modified servos operate as normal servos but they rotate 360º continuously, and you can learn howto hack them watching this video tutorial (in portuguese).
This robot is still a work in progress, and I will upload new pics soon.
Few days ago I started wondering how could I make a Radar Simulator with Processing.
I have already placed an ultrasound range finder on a servo motor and sent its data into the radar program, one video will be posted soon.
Now I want to have my wireless communication module setup complete and working on a robot, and I can have the sensor data being displayed on a screen as the robots move around the space. This will be a visual reference of the robot perception, it is also a good exercise of physical computing.
This applet simulates the sensor data through the Y mouse coordinate, have fun :]