What is your opinion of the AI?
I'm baffled by a recent Gamespy review of Sins that called the AI "very good". In my experience, the AI is passive, doesn't defend its territory, and doesn't adequately defend its home world. In four games, I've only been attacked in force three times. In two of the attacks, the attacking force retreated almost as soon as it entered the gravity well. In the third attack, the attacking force was decimated by platforms and bombers. I didn't even bother sending a fleet to help.