Here's some quick shots of my robot B.bro - he's named after the character in the song "Baby Brother" by the White Stripes.
The brass tube is a holder for Sharpie pens so he can draw patterns on the floor. He's got a dead simple user interface (an LED and a pushbutton). When I turn him on he sits there and waits for me to push the button. Then he takes off and draws a simple pattern - stopping and lighting his LED when he's done. This allows me to pick him up and move him, or change pens to a different color. Then I push the button again and he takes off once more. In the near future I'll be posting some video of him in action, and technical stuff like schematics and source code. Hope you like him.