*Re-uploaded this from my old & deactivated account.*
After looking through my wallpaper collection, I noticed I didn't have wallpapers with OS logo and certain kind of wood background so I decided to make my own.
Wood backgrounds I found somewhere on the Internet and basically slapped the logo on (with couple of effects.) ;>
Windows, Apple and Ubuntu logos belongs to Microsoft Corporation, Apple Inc and Canonical Ltd, respectively.
6 wallpapers and a preview included in this .zip download.