Invisible Monitor Background

It's not a David Coperfield article but it almost looks like one, it's actually a trick to make a cool background image for your computer or laptop, that will make your friends go "WT*?"
Seems like the monitor is transparent but the only thing you're doing is taking a photo of the spot where the monitor is suppose to be, and tweaking it a bit with a graphic program. Like someone commented on Instructables, this would look better in a LCD monitor.
Check more examples of this art at w00kie's set in Flickr, I particularly like this one, and you?
Learn how to do it, at Instructables