I'm sure most of you are already aware of this, but if not then pop along to:
http://dangerdeep.sourceforge.net and download and take a peek. I had a look today and it has the makings of a very impressive simulation. They seem to emphasise realism and i'm sure a few people in these forums could certainly help them achieve their goal.
Anyway, have a look....its about a 13MB download and there is a Win32 executable so no ned to compile anything.
Cheers....