Here are the best wallpaper sites that I have found so far. They are ranked with 1 being the best and so forth.

1.pixelgirlpresents.com <---- This is the best site to get wallpapers, with so many different catorgories, it will take you days to browse everything they have.

2.crystalxp.net Categories: Abstract, 3D, Nature & Landscapes, Mascots & Tux, Computer & OS, People, Miscellaneous

3.vuni.net Nice dark wallpapers.

4.dugnet.com Nice light wallpapers.

5.skeedz.com Everything is in here, from light to dark, people to cartoons.

6.space.com Wallpapers for your Desktop in categories: Apollo, Mars, Moon, Earth, Hubble Space Telescope, 3-D Space Art, Stars and Galaxies, Solar System, Saturn’s Rings

7.blurburger.comt Cartooney wallpapers

8.meomi.com Cutsey.

9.caedes.net Over 12000 images: photography, 3D computer art, fractal, abstracts, nature, and space.

10.wallpaperstock.net Tons of categories to browse, you'll fins something here.

11.exoteric.roach.org Dark fractal wallpapers, very pretty.

12.stevetruett.com More dark wallpapers.

13.socksoff.co.uk Photography made wallpapers.

14.nationalgeographic.com It's National Geographic, come on you know there's good stuff here.

15.hubblesite.org Pictures from outer space.

16.interfacelift.com Another "everything" wallpaper site.

17.tribalcog.com Travel Wallpapers in 5 categories: 5 categories: The Beach, Blue, Landscapes, Cities, Towns & Buildings, Images of Gods