I'm really just looking to display a screensaver which _is_ something people want and care about. All screensaver software that I've seen supports displaying a

I'm really just looking to display a screensaver which _is_ something people want and care about. All screensaver software that I've seen supports displaying an image / slide show which I will simply set to a black image. Another common feature is just displaying black. Note: in Windows both of these are quite easy.