From their website:
The rules for Exodus (pdf, 2.1 MB), the upcoming expansion for Battlestar Galactica: The Board Game, are now available on the support page. With three new options to add to your game, Exodus is a great way to expand on the accusations and mistrust that run rampant in Battlestar Galactica.
You can choose to add any combination of the three new options included in Exodus. Crave more white-knuckle space dog-fighting? Incorporate the Cylon Fleet option. The Conflicted Loyalties option introduces new Loyalty Cards that will test even the most trustworthy allegiances. Finally, relive the emotional turmoil of the hit television series with the Ionian Nebula, which pits players against the various conflicting personalities aboard Galactica.