man this concept blows me away as well.
back back way back before the war (and well after the war too - cheers to 6 month wars) when I was stationed in england, my roomate and I used to play those classic nintendo(nes) koei games like romance of the three kingdoms and Gengis Khan as a sort of proto SG concept.
I was the infrasructure wiz and would spend infinite time min maxing all the queues and the micromanaged 'nibbly bits' that makes turn based games soooooo fun.

My roomie would get fed up and kick me off the controller while I took the free time to get the beer and remember to use the restroom.
Paul was the 'burn it all down - again!' type who would take my neatly trimmed lawns and trained peasents and just RIP apart everything, much to the chagrin of the poor AI's within our reach. He was very much a burnt toast sort of warmonger making sure to
completely strip anything he didn;t plan on leaving me.
So when paul's offensive push finally pettered out he would abdicate the throne ...er lazyboy... and call me over to um "fix crap".
He would hand the empire back to me always larger than before but always in a complete state of dissarray with peasents run amok and the gardens weed strewn.
And so the cycle repeated - albeit a little more woozy from said beer.
This SG thing takes that so much further in that it's online (duh) and civ is so much more complex a game than ghengis khan was/is. This complexity sets SG up as a great teacher as it really helps not only the lurkers following the sulla/sirians but also the players themselves see how others think.
Also, the strict turns means you really focus on your portion and have to reassess your views/opinions on the game. Amazing synergy in that I'd dare say peeps that compliment each other, like sulla and sirian, play a stronger SG game than solo in that they constantly have to prove/justify their moves to the other, even if the other never says anything.
Amazing job all around on this site but SG is the Crown Jewel. Having fun while you learn and it's easy on the sleep deprivation if you stay away from the odd mono games
oh man look it's after 4 am, better start another game before I realize it's late.
Cheers!
-Liq