The previous post on this blog linked to a website with some very nice creations, and Daniele Benedettelli is another MINDSTORMS builder who creates very complicated machines. His latest model is a portrayer, which turns an image or picture into a real drawing. You can watch the video of the robot in action below, or by following this link.
You can also view a TV interview with Daniele following this link. The video also covers some of his other creations.