While searching around on the net for Vista easter eggs, I came across a neat little trick.
If you launch any of the Microsoft supplied screen savers from a command prompt followed by the switch "/p65552", it will run as an application overlaying the desktop. The regular desktop icons and background are overlayed, and an item for it appears on the task bar, but everything else works as normal with the exception that you have to kill the screen saver from task manager.
You can create a shortcut for a particular screen saver that doesn't leave behind a command window.
My favorite shortcut
cmd /c start PhotoScreensaver.scr /p65552
I don't have any non-MS screen savers, it might work with all screen savers.
Screenshot with ribbons screen saver.
If you launch any of the Microsoft supplied screen savers from a command prompt followed by the switch "/p65552", it will run as an application overlaying the desktop. The regular desktop icons and background are overlayed, and an item for it appears on the task bar, but everything else works as normal with the exception that you have to kill the screen saver from task manager.
You can create a shortcut for a particular screen saver that doesn't leave behind a command window.
My favorite shortcut
cmd /c start PhotoScreensaver.scr /p65552
I don't have any non-MS screen savers, it might work with all screen savers.
Screenshot with ribbons screen saver.