For the adventurous at heart, the latest source and install of PocketCiv is available for Windows.  Mono in theory works, but I've done no testing whatsoever.

Please check out the readme.txt for what is included and a quick start on how to set up your own maps and play them.  As a general warning, if you don't like clicking on things, you might find the game painful in its current incarnation.  

You will need Microsoft.NET 2.0 installed, which should be on a recently patched XP machine.  If not, go to Microsoft's site and download it.

Next release will be in two weekends, if not sooner.

The game is admittedly rough and a little ugly (like myself), but functional and you should be able to get through a game without it blowing up.  If it does, contact me or throw a thread down at BGG and I'll address it as quickly as I can.

This game is open source and free of cost - and will always be - so feel free to contribute tips, pdf's, graphics, etc. to the cause.