DayZ's "true blue" alpha launched on the Steam store today for $29.99. The release is part of Steam's early access program with a caveat posted that players should not purchase it unless they're OK with "serious issues and possible interruptions of game functioning."
The launch was accompanied by a trailer which has since been pulled from the Steam store due to its graphic nature. Lead developer Dean Hall bemoaned the move on Twitter: "At the last minute, despite being told of the contents of my trailer for DayZ, Steam pulled my trailer due to censorship." The video is still on YouTube if you're curious, although be aware that it is NSFW and has a scene of a suicide.