I mentioned in the post Randomize your desktop with Desktoptopia! about changing boring wallpapers every so often. But if you don’t like random wallpapers, I’ve got a great site here that was found by a friend with some great wallpapers for your desktop.
The site to go to is http://www.interfacelift.com.
There’s hundreds of excellent wallpapers there and you can download them in all sorts of resolutions for all types of monitors.
Check it out for a fresh look to your desktop.