I'm surprised that no one has mentioned this. There is a Battlestar Galactica game out there. Its called Beyond The Red Line. Its developing into a pretty awesome game, with you playing the role of a Viper pilot or a Cylon Raider. It's free, runs on Linux, Windows and Mac.
Its available at http://www.game-warden.com/bsg/ (http://www.game-warden.com/bsg/)
And here are a couple of obligatory youtube videos:
http://www.youtube.com/watch?v=FC6LSD5lic4 (http://www.youtube.com/watch?v=FC6LSD5lic4)
http://www.youtube.com/watch?v=Lqr4dqzUY5Y (http://www.youtube.com/watch?v=Lqr4dqzUY5Y)
You can even get the soundtrack from the downloads page.
Very cool, in what little time I've had to play around with it.
--VR
I have played this for awhile it is a good game and appears to be better made then evan the new proposed xbox game that is in development.
I will definitely have to check that out soon!