What do you get when you cross a Roomba with a Pacman? The Pacmba, of course.
The project consisted of mounting 448 yellow LEDs to a Roomba, and making a board to control them and play Pacman sounds when appropriate.
Actually, I think the sounds are a really cool part of the project. It plays the Pacman intro when it starts, and of course the dying Pacman sounds when the unit shuts off.
Check out the video for more details.