well, here is my contest entry.
Feel free to leave any feedback other then the fact that it should use webstart (yes, that means you, Blahblahblah! )
Requirements/install instructions:
You need to install the CG Compiler/runtime from NVidia for the shaders:
www.nvidia.com/object/cg_toolkit.html
Choose the appropriate CG Compiler for your operating system
Make sure you are running the latest drivers for you video card
Install java from www.java.com (click on get it now in the top right corner).
Extract the zip file and execute the GroundFX.bat file.