Hey folks. Running the game in DX 9 works more or less perfectly for me, on highest settings (Except AA which seems unavailable?). Kind of counter-intuitive
Thanks you all 
Otherwise, random thoughts:
Now, pre-order gimicks are just that, and I don't usually go in for them unless I know I'm getting the game anyway, but I have to say that the Mesopotamia map is pretty fantastic, and easily my favorite at the moment. Definitely feels like a lot of love went into it.
What difficulty are you playing? I started out at chieftain for a game, but steamrolled the AI in every aspect, and the happiness boost makes spamming cities a little to easy. Tried prince for a few games, which forced me to play a conservative game in regards to city placement. The AI obviously receive a happiness boost, as England, my closest neighbor in the latest match, has far, far, more cities than I do and is still expanding, but doesn't seem to have access to any greater variety of luxuries. Next game I'll move it up a notch or two.
Diplomacy, in a word, is limp. Limp is a good word, and it serves to describe diplomacy well. Pacts of Secrecy and Pacts of Cooperation don't have any apparent function. The relationship with the AI also pretty constantly drops unless you go to war for them, or bribe them with resources and gold. I have noticed they are more likely to sue for peace when things go badly, often ceding cities, which is an improvement over previous games.
On a similar note, someone on another forum was saying they felt that AI civs now feel more like actual participants in the game, striving to win, while the city states have taken up the NPC banner, if you will. After thinking about it, I'd have to agree with them. AI Civs do feel like they are more motivated and active, like they are striving for the same things you are, and less like sources of "free cities" and extra cash flows for those redundant resources. City States, meanwhile, fill a nice static niche. They offer a little help in wars, and their culture/food/unit bonuses aren't bad.
You could certainly build entire strategies off of city-states. If you played it right, you could feed a mid-sized empire off maritime tributes, and likely build as large an army as you need off the free units.