I've been experimenting with Apple's new 5-dimensional desktop, it can get complicated though...
Take the Dock Preferences for example, in 10.5 it can be bottom, left or right...
In 10.7 it's bottom left, bottom right, back left, back right, intermediate middle left, intermediate middle bottom or left back front, or combinations of rear, left, middle, side, back bottom, side or middle of the screen (intermediate hasn't yet been implemented)
It's quite good, but because it's multi-dimensional, you have to be careful when you use Dock Magnification, easy on a 10.5 Mac I know, but the Dock icon expands into the fourth dimension, becoming invisible or expanding into an unknown realm, opening up a black hole, spilling your documents into the delta quadrant...
The new Windows version is great though they have this...
C:\>_