Digital Blasphemy is another of my favorite sites I want to share. An incredible selection of wallpaper files. Not your basic repeating pattern, but complex, 3-D graphical scenes carefully constructed by a digital artist. There are 35 images available for free and for the rest, you'll have to subscribe to the site ($25/yr, $12 for 90 days). I subscribed and have been very happy. All the files can be downloaded (at resolutions upward to 1600x1200) together if you want a quick grab and Ryan adds a new creation every week or so!