Running no screen saver here. No need. As far as background graphics, many ways to get high resolution stuff. BoCo offers some snazzy pics, or you could check out some links for Hi-res graphics.
You could sweat it and look for the stuff, or, just check, <a href= "http://tfproject.org/tfp/showthread.php?s=&threadid=709">BoCo</a> daily. He puts many hours of scouring links to share quality product.