I've uploaded the code into github.
The simulation runs as a netbeans project and is all cli (no graphics)... Shouldn't be too hard to make it a standalone graphics thing. I don't have a standalone server that I can put it up and host it as a servlet - that would be ideal, then folks can just plug in the code, adjust some parameters, and off it goes.
I am definitely interested in helping on the widget in any way that I can.