This post appears to have been removed, the link is broken. I don't know why. Sorry about that.
I'm not much of a Photoshop user (the Gimp is the closest I come), but I am a fan of watching clouds. I've always wanted some software that would generate random clouds for me, something I could use as wallpaper. I like meditating by finding interesting scenes in them (and I'm not just talking about "hey that one looks like a dog").
So I was pleased to find this tutorial specifically on creating "realistic" clouds. When I get some free time I'm going to see if all the techniques work in the Gimp. Hey, does somebody want to script something up for me that regularly regenerates a file of clouds that I can attach to my desktop? :)