Edit: Unfortunately, the images originally included in this post are gone, because of hosting problems in late 2009. My apologies.
I had to see if the GL versions of the xscreensaver package would work as desktop backgrounds for my faster machine.
They do. 
Nice,
what about a how-to 🙂
It’s right next door … http://archetypical.wordpress.com/2007/02/23/xscreensaver-as-wallpaper/