this wiki article helped get some interesting views on chance art:
it was pretty informative. It included the use of technology in random art and how many programs are now built to use chance for the making of random art.
I followed a link through this to Dynamic painting, where artists use algorithms to create ongoing paintings with computers. You still need the artists input, the vision of how to implement the Algorithms, just like the decision to make certain steps in a process random. In both cases parameters are set and the art is left up to itself to create itself.