Your mouseover-fu is weak...
My fathers company actually helped lego build the program that does these now. The little kid inside of you would like to believe they hire super creative people taht play with Lego's all day and make cool shit. No, they hire engineers who know how to import a digital 3-d image into a computer program and hit the generate program. And then the computer program figures out how to build something that looks as close as the digital image as possible, piece by piece. The program can even generate an exportable file that can be used to CREATE a new Lego piece if they don't have pieces that can do the job already.
Very cool piece of software. Was fun to play with.