UPDATE 03/22/2012: I've uploaded a new & improved version of this wallpaper. Check it out: [link]
Marvin the Paranoid Android desktop wallpaper, from the Hitchhiker's Guide to the Galaxy (movie version) by Douglas Adams.
Since there is a serious lack of quality Marvin wallpapers on the internet, I decided to make my own.
2 years later, I've decided to share it with you all.