In this article over at RTS GuruDotCom they talk about Stardock opening a new store. They also happened to mention something.
"Sins of a Solar Empire
NEWS posted Nov 28th, 2011
Stardock Opens Online Store, Preorders Open for Sins of a Solar Empire: Rebellion
Stardock has opened its brand new online store just in time for that holiday shopping you've been meaning to do. The very neatly organized shop will let you purchase Galactic Civilizations, War of Magic, Sins of a Solar Empire and its DLC, and other games.You can also preorder the Rebellion expansion for Sins of a Solar Empire through the store.
Rebellion, which launches on December 1st, is a full major expansion for the game. You can become a Loyalist or a Rebel this time around, each side unlocking its own trees and tech. It also features new ships across several categories and Loyalist and Rebel versions of some existing ships, as well as added ship ability levels. There's integration with Impulse via GameStop for achievements and chat too."
And I Quote.