The popular ARMA mod, DayZ, is going to be an official game. Bohemia Interactive has taken the project under its wing and it will be lead by the original developers. However, they will still update the mod in parallel with the standalone game.
The DayZ team are also going to adopt the Minecraft model for purchasing the game. This means you will be able to buy the alpha for a reduced price.
Development and updates of the mod will continue in parallel with the development of the game, so anyone who is playing the mod now will be able to continue to do so. The project will follow the Minecraft development model; fast iterations with the community alpha available for a heavily discounted price.
You can check out their website at dayzgame.com. Unfortunately, more information is not available at this time, but they did leave us with an interesting quote from Winston Churchill.
Now this is not the end. It is not even the beginning of the end, but it is, perhaps, the end of the beginning.