You know what... I would be buying this right now, except I discovered Minecraft and it's arguably more addictive even than Civ. It's worse than one more turn. I seriously sit down with a single goal in mind figuring it will take 30 minutes only to find that I was sitting there for 3 hours and had branched into a dozen things.

Looking forward to Civ 5 when I get around to it though. These days I'm just a junkie moving from one fix to the next. Hearing people talk about it, reading/watching reviews, etc.... I just get to jazzed about some of the new features and immense polish.