I did not receive my pre-order email with serial either. But I got a response yesterday for a n email I sent friday of last week. Before receiving a response to an email I sent back, I signed up to these forums, and found a button where I could request serials, which I did and I received them. I then DLed Stardock Central and then continued to DL Gal Civ II. Now just waiting for the game to come online...
TIP