I found a remarkable wallpaper site today called Vladstudio. Vladstudio is the project of Russian digital artist, Vlad Gerasimov. He has such an assortment of the most unique desktop wallpapers that I've ever seen. There's every size imaginable and even wallpapers for cell phones. I particularly like the wallpaper clocks. These include his lovely wallpaper with a digital clock on it with the time, day and month. Each clock is unique. You can become a registered member (for a very modest fee) for the highest quality images and more sizes, or there are plenty of free images to download.