Having just updated my iPhone 3GS
I might be alone on this one, but I really don’t want anything distracting behind all my iPhone app icons and Apple haven’t given you a way to revert back to a black wallpaper. You could simply cover your camera lens and take a dark photo and set that or instead, just click and hold on the image below to save it to your camera roll and set that as your homescreen wallpaper, problem solved.