This is an unusual idea for this forum, but it's one that's been kicking around the inside of my skull for a good four or five months, aching to get out. So I'd like to see if anyone would be interested in it.
The game would be a turn-based text version of Civilization 4 (with some changes, more options, and few if any graphics). You would play the role of civilization leader, and start with a simple village, harvesting food, metal, wood, food, and other items. You could invest in improvements for your village, and over time it would expand, accruing Culture, Civic, and Knowledge points which you could invest. You would also need to build military units to guard against outside threats.
Over time, other civilizations would expand, and you would encounter them...trading resources and ideas...or arrows and sword-thrusts.
You could also found new villages, which would grow in time. Random events would also happen.
The game would offer considerably more depth than Civ 4, though I'll admit straightaway I'm no visual artist and any graphics will be very basic and cheesy.
If you'd be interested in such a game, let me know, and I'll put some "meat" on the bones I've described here and run it for you.