F1 Pit Strategy Software - anybody?

While watching the French GP where we had different teams on different fuel/pit stop strategies I was wondering whether there is a simulation software somewhere available for us fans?

If Matchett can do his predictions of fuel loads etc I'm sure some of us could come up with our model. Then add some CPU power to do a realtime prediction of the race simulation and you could figure out at any given moment whether a 2 stop strategy would work or not. Of course all things being equal, which they never are. But it'd be fun I think.