Found an interesting article at CodeProject: An experimental user interface with real physics.http://www.codeproje...ctrl/FunPhysics.aspx
The example is simple but compelling. By stringing objects/icons on a clothesline thingy the user gets interesting feedback, potentially about the "weight" of the object (how large the resource) or maybe different objects have different physical attributes. Since it's just a concept, your guess is as good as mine.
I doubt we'll have virtual clotheslines strung across our desktop anytime soon, but I'm always intrigued by new GUI paradigms. If nothing else, lift some code for particle physics to use in your own projects.
C# (.NET 3 Framework) source included.