True dat. Only one of those I had was a fish tank. It looked absolutely great.
But, all my machines are crunching proteins to find a cure fior cancer for the UD project (that means the CPU is working at 100% 24/7). Now, UD lets other applications take precedence and that screen saver actually doubled the time it took for one UD Work Unit to be processed.
Now, I don't use screen savers at all. If I no use computer, I turn the Monitor off.
And sorry, no, I don't know any sites with animated desktops. I do know a few good wallpaper sites though. I mentioned screensavers as an animated desktop would take up around the same amount of resources, but all the time you had the desktop displayed.