Civilization IV for the Mac

Civilization IV was released for the Mac about a month ago. It's having much the same birthing pains it had on the PC. I bought the Special Edition of Civilization IV for the PC shortly after it came out. The forums were filled with wailing and moaning and knashing of teeth. A month or so later a patch was released and the game even ran on my under spec Sony Vaio PCG GRX670 (a bit choppy, mind you, but I was willing to put up with quite a bit just to be able to play). I'm planing on buying my first Mac in the next six months or so. I'm waiting for the Merome to hit the laptop line. I'm hoping to get a MacBook (plain, not the Pro). And I'm hoping to run Civilization IV for the Mac on whatever I get. Yes, once again, I'll be trying to run the game on an under spec system. From what I've read, however, people who've played it on a MacBook have had similar experiences to those I had playing it on my Sony Viao, so I think I know what I'm getting into.