Well, actually, it's not Artoo. This is R9-D9, the local housekeeping droid. He's often confused with his far more famous cousin, which causes him much consternation.
Still, he's impressive in his own way, too. Unlike Artoo, he doesn't serve drinks or save the galaxy. But he does vacuum and mop the floor. Matthew Scott Hunter made him out of a knock-off Roomba, a trashcan, and an assortment of household items. R9 really makes all of those sound effects and rotates his head realistically. He's an excellent piece of household engineering.
-via Geekologie