UPDATE: Get Arma II for free here. That means you can play in multiplayer, but not Operation Arrowhead.
According to the releases that have just popped up from BIS, Arma II is available for free, while OpFlash has been renamed for future release. Sadly, they do seem to be jumping the gun somewhat, as the download links are not actually live on the site in question. When the links do appear, you'll be able to get a version Arma II, minus the single player campaign, minus fancy graphics, but with all the awesome multiplayer and editor stuff, for nowt. Hell, we might just have to run some "Arma II 4 Nowt" RPS evenings so that some of you who haven't yet tasted the pungent, leathery-yet-addictive taste of hard simulation can find out what it's all about.
The other news which my headline so clumsily reveals is that the original Operation Flashpoint is now back in the BIS stable, although now called Arma: Cold War Assault. BIS say: "All existing users of Operation Flashpoint: Cold War Crisis and the Game of the Year Edition are entitled to download and install Arma: Cold War Assault at no charge. The game will also be released through various online stores in the near future." So free if you already own it. Which is not free. Or is it if it has a new name? I am confused.
All this comes as BIS celebrate ten long, sometimes buggy years since the launch of the landmark soldier sim. Good job, them.