Did you ever thought to use your screensaver as desktop background? Freshly Squeezed Software has given a thought and developed an application to render any Mac OS X screensaver as your background called BackLight.
BackLight provides a menu extra that allows you to use screensavers as your desktop background. It can also change your screensaver and open the preferences. Having your screensaver on your desktop is quite a cool effect, but you should probably have a Quartz Extreme-capable machine if you want to handle the load.
The program menu is simple and easy to use. The program itself hogs about 8-10% CPU on a 2ghz Core Duo machine, and is more of a eye candy. It’s not advisable to run, if you constantly do processor intensive work. Overall, it’s a nice fun application and surely would generate some jealously to Windows counter parts.