Well, Sly, you're "wasting" my time alright. I've downloaded CivEvo (or cEvo?) and expect to spend the next week or so - <ahem> 'studying' the code. I'm especially interested in the interface for the AI modules; are they sufficiently high-level to ignore implementation details such as the switch from squares to hexes. Also, his technology tree might be cleaner and easier to incorporate (though I'm still not sure I want to get that detailed). :?

Alimonster, thanks but I've already seen Amit's excellent site. Still have a few tutorials to go, and will be reviewing it all. I especially liked the customized Google search for 'hexagonal tiling'.
Of course, I saw the article here as well.
The RiverSoftAVG and Gamasutra are new links. Thanks!