Impulse announces that Stardock's online service is now accepting preorders for Sins of a Solar Empire: Diplomacy, the upcoming "micro-expansion" for Ironclad's space strategy game. Word is:

Sins of a Solar Empire: Diplomacy will add a new Diplomacy tech tree, new envoy cruisers, the ability to issue missions to other players, trade pacts, an entirely new relationship system, deadlier pirates and more.

Pre-orders for Sins of a Solar Empire: Diplomacy are available now for $9.95. This micro-expansion will require the full versions of Sins of a Solar Empire and Sins of a Solar Empire: Entrenchment to play. For more information please visit: http://www.sinsofasolarempire.com/ or to pre-order visit ImpulseDriven.com.