I came back to Civ IV yesterday for a one-shot Earth18Civs, and wondered what had happened to Nobles' Club. Thanks to everyone involved for keeping it going.
In answer to a question from several years ago, I did not create the club, and forget who did. My main contribution (aside from running it for many months) was the scripts that let you choose what level to play at, while making sure the AI for that particular level was set appropriately; I gather folks do that by hand now. I think I wrote them as emacs macros, and emacs is available on Windows as well as Linux; I don't know if it's available for Macs.