The full scope of diplomatic options in Galactic Civilizations 3 is currently unknown, but Stardock offers a handful of images detailing the game's new features. Players will now be able to set up treaties with computer-controlled characters, and can officially declare war without having to gun down nearby enemy units. Additionally, the beta expands the game's trading options, adds the new Krynn faction and implements four new victory conditions.
A full list of the beta's additions is too lengthy to appear here, so visit the game's forums for a full rundown. If you're hoping to join the beta test, you can do so at the Galactic Civilizations 3 website, though be aware that early entry requires a $45 pre-order of the final game.