You must admire the following project: e-David painting robot, the closest thing to robot art so far, paints with water colors and fixes itself by computer vision based algorithms.
e-David Robot Painting from eDavid on Vimeo
Working on KeerBot exposes me to many interesting things people do with robots and on the boarder between robots technology and art. The e-David project (via ieee robotics) is one of the most amazing projects I saw so far, a robot that paints, with water colors (simpler version can be seen here). and analyses the resulting image in real time for autonomous artistic optimization (bit philosophical….)
Really impressive project that results nice images (will it be worthy one day, since it can be copied ?!)