^ But that won't be the last of Sins updates, the third pack of content will most likely be a little more expensive, with plenty of more content than the ones before it. There's no way to know for sure, but I'm thinking we'll see a campaign and/or more big changes when it rolls out, but that will probably be quite a while from now (not that I'm complaining or anything).
http://news.bigdownload.com/2009/09/05/pax-2009-no-more-plans-for-third-sins-of-a-solar-empire-micro-e/