I have an idea for some software that would be cool eye candy I think, but I don't have time to learn how to do it. But I think it would be something cool to implement.
Anyway, the idea is to take the Mac dock and the Nautilus desktop and merge the eye candy. As you mouse over the icons on the desktop, they get bigger and the other icons move out of the way, like the icons on the Mac dock.
I think that clutter could be used to complete this pretty easily.