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.