How do you advertise to a robot?

Found this great post from Dave demerjian’s blog on the future of advertising touching on the crazy, nightmare scenerio that all roofs of the world could soon covered with 'roofboard'  or 'barn' advertising. With the obvious growth and technical advancement of mobile there will be growing use of more sophisticated google maps, more mash ups with 'roofboards' with widgets, links and even web video. It goes on to describe the development of direction sound and sex recognition billboards that change to suit the sex of the person walking past it, then on to advertising to robots. All these ideas are discussed on Ilya Vedrashko MIT ad blog, whose a media strategist at Boston ad agency Hill Holliday.