http://www.fileshack.com/file.x/11451/Universe+at+War:+Earth+Assault+Demo
http://www.gamershell.com/download_22019.shtml
Demo is out and Worth checking out, it looks really nice and although only small levels you can get a feel that a lot of pew pew lazers etc about in the battles would be really cool
Theres a torrent for the demo here:
http://www.gameupdates.org/details.php?id=1900
its nice to be fair, only played it for half an hour the other day, but I do like it. The game feels "Nice" to play.