My wallpaper is from the nvidia SLi zone www.slizone.com they do various ones and I liked the look of that the best. My theme is directly from alienware

http://www.alienware.com/intro_pages/invader.aspx

The theme is alienware but I like my desktop wallpaper so I kept that. I have the icons, windows and taskbars all from alienware though. They do various other themes as well not just one. All from one program and you can interchange. Really cool, try it!