there are maps available on out there, but no one will release the code. I think it actually uses PHP and Java.
We use PHPVMS to track the hours etc, but we fly online together, using FSINN, which is a FSD based server.
FSINN creates a TXT file called WHAZZUP.TXT with the data of all the players, like co-ords, speed, alt etc
The script then takes this, and displays it on a map, just like PHP VMS, but uses the data in the TXT file.
You can see an example here
http://xfsd.ansorg-web.de/fsdmap/