I'm rocking the Portal wallpaper you see here on my home computer.
On the work desktop I've got some Calvin and Hobbes, which has remained one of my favorite pieces for some time now.
And here's a full version of the fancy Portal wallpaper. The artist's name escapes me, unfortunately. If you know who it is, let me know!
Now it's your turn. What've you got on your desktop? Or even phone? Snap a shot and show it down below. You might even find some new wallpaper to work with.