I've read that TEW 2005 will be avaliable for free from www.greydogsoftware.com from July 1st. It's like Extreme Warfare Revenge but a bit more detailed, so we'll see if it's any good I suppose.
I've played all 2005, 2007 and i also bought the new game. I think its really good. Obviously its a fictional roster unless you download the patch. However i find that the fictional universe is more fun to play. 2009 is extremly in-depth and i often look at 2005 and think how much simpler it was and even probally more fun.
It will be fun if we all go get 2005 and can have discussions on here.
Check out this website for an overview of the fictional universe.
http://www.greydogsoftware.com/cornellverse/