Electric Sheep is a free, open source screen saver run by thousands of people all over the world. It can be installed on any ordinary PC or Mac. When these computers "sleep", the screen saver comes on and the computers communicate with each other by the internet to share the work of creating morphing abstract animations known as "sheep". The result is a collective "android dream", an homage to Philip K. Dick's novel Do Androids Dream of Electric Sheep.
Anyone watching one of these computers may vote for their favorite animations using the keyboard. The more popular sheep live longer and reproduce according to a genetic algorithm with mutation and cross-over. Hence the flock evolves to please its global audience.
got Electric Sheep running on my Windows and Linux installs, it's excellent
left mine running overnight (they recommend you leave it a good while at first use to get some good sheep going), it looks bloody excellent now this morning
you need to give it a good 10mins minimum to download the first one mate, but once you've done that once you don't have to do it again. If it's still not working check in the settings because i think there's some network settings you can change for it (i'm on my linux install at mo so can't check for you)