Newest files:
Latest version is 2.2.1
Grab it from the sourceforge.net mirrors.
SVN
Stable branch
svn co https://ufoai.svn.sourceforge.net/svnroot/ufoai/ufoai/branches/ufoai_2.2 ufoai_2.2
Latest development version
svn co https://ufoai.svn.sourceforge.net/svnroot/ufoai/ufoai/trunk ufoai
Media
2.2 Promo trailer
General:
The newest downloads are available at Sourceforge.net
There is also a place for some beta installers at mattn.ninex.info