They say that’s how you die, a lonely man…
The above is the image I’m currently using as wallpaper, which I found via this post on Yirá Albornoz’s blog. It’s one of the many wallpapers included in the build 7048 of Windows 7, all of which are awesome; though I agree with Yirá in that this is the best one. If you want to download them, at the end of this post I include a link for it.
A sample of the wallpapers included in the folder:
Source: Redmond Pie