Believe me, I'm not trying to hijack this thread; but, since you mentioned Steam, I just have to say this: Steam sucks.
While living on the road for three months, I dropped fifty bucks to download Napoleon Total War, only to get involved in this Steam garbage. When the game wouldn't open, their tech said update the drivers. Duh.
I've just uninstalled the whole mess and consider the $50 a write off and lesson.
Back to your point about Warbirds: I was involved in the free beta, played it on a Commodore 64, 'Confirmed Kill' and played WB till 2003 when I could no longer stand the Axis/Allies setup. Their people who now run Warbirds just dragged it into the gutter. I assume the people who are still there are Mac users who cannot afford a second computer.