It turns out there are others who are fans of the sadly out-of-print Avalon Hill title Advanced Civilization. A group calling themselves Civilization: The Expansion Project have been working on updated rules and an expanded map board to support 16 player play! Awesome.
If only it were possible to get new prints of the cards and maps so we could play this old game. There is a beta module for VASSAL available, however. VASSAL allows you to play board games online. Mostly geared toward wargames, it's a fairly generic engine that lets you produce your own modules. It seems handy, but I'm yet to find someone to try it with.