I haven't yet mentioned it on Free Gamer but Freeciv 2.1beta4 was out this weekend.
Freeciv 2.1 has far better graphics than 2.0, a themed UI (Gtk or SDL alternative) and lots of gameplay balance tweaks. There's a world of difference between 2.0 and 2.1!
YMMV with this release and the .deb I just created. I'm using Feisty Fawn and used checkinstall to create the .deb package. I do not offer any kind of support nor guarrantee it won't hose your system. Use at your own risk.
However it should be mostly harmless.
Get it from here:
http://www.filecrocodile.com/?d=F28566042 (gtk version, 9megs)
http://www.filecrocodile.com/?d=D95441752 (sdl version, 11.5megs)
Note: you can only install one or the other, not both at the same time.
To start the game try 'civclient' from a terminal. Happy civilization building!