I'm a latecomer to this fad, but here's my entry into the transparent screen phenomenon that was all the rage. It's far from perfect. But it's true that the final image is not a composite; photoshop trickery is needed only to create the desktop background image. And even that was fairly simple-minded in my case, because I don't know how to use any of the perspective tools in Gimp. :(
This reminds me: I can't stand when someone observes an act of amateur creativity and says “he has too much time on his hands.” I guess it reflects the Protestant work ethic: idle hands are the devil's tools and all that. But in my estimation, it tends to be said by people who spend much of their leisure time parked in front of the boob tube. Who are you to judge that reruns of Friends are more worthwhile than making an Earth sandwich? Personally, I want to live in a world where everyone has the time and inclination to pursue whatever creative outlets strike their fancy.