This is not exactly a new concept and the software to do this sort of thing has been around for a while but it looks like something you could have alot of fun with. Im going to be playing around with a few of my own.
Free software for a keen Rasterbator @ homokaasu.org or you could also check out arje.net
Michael Kingery from the USA has an informative Beginners Guide to large scale rasterbation

by Michael Kingery
There as some really amazing results you can achieve but take a look through this gallery for inspiration. Now go have a good rasterbate!