DaliLab Inc (short for Distributed Artificial Life) has started Daliworld.net, a virtual internet fishtank. Like Napster, this takes advantage of connected nodes of computers, but instead of sharing files, you're sharing fascinating, realistic fish in a reef enviroment.
Unlike the average screensaver, the programmers of Dali have tried to create an artifical ocean enviroment, where fish can swim as they please across the internet, living, dieing and multiplying like real fish. There is even code set in for further generations' evolution and adaptation to avoid preditors and to find better places to swim.
True, it doesn't take a lot of smarts to be a fish, but this is another example of the vast changes in processing power in computers.
To download DaliWorld's fish program, go to the DaliWorld website