Andy recently ran down the contents of GalCiv 3's Beta 2 update. But, if reading words makes you itch uncontrollably... well, first, I'm very sorry, this very page must be unbearably hellish. Second, there's now a video that runs through the diplomacy patch's contents.
In addition to diplomacy, the update adds new victory conditions and trade networks. It's a significant step along the road to the early access 4X's eventual full release.