Well, there is hope as BI are helping out, as stated on Kotaku/dayz:
"There's no doubt that the thrilling Day Z mod currently drives Arma 2 Combined Operations sales on Steam", he says with a touch of understatement. "Sales have increased almost fivefold from how they were before Day Z's Alpha release!"
"That said, we have always been proud to provide a PC exclusive type of game like Arma 2, with a strong emphasis on modding and the user community."
Asked whether the mod's success could lead to Bohemia Interactive actually lending a helping hand (the mod's creator is currently a little overwhelmed by the response), Španěl says that the developer is actually accommodating DayZ in ArmA II's next update.
"Bohemia Interactive has always tried to help community mod makers in many different ways and Day Z mod is no different", he says. "We're more than happy to assist DayZ in any suitable way and considering the mod's popularity we are committed to do some related work in the next Arma 2 update (1.61)."
"We are actively communicating about how we could best support the Arma 2 user community especially in multiplayer and Day Z players are right now a significant portion of people actively playing the game, so of course it's high on our priority list to support it the best we can. It's important to understand that DayZ was released just a few weeks ago as a tech demo/proof of concept and it's still at Alpha status so until we know where the project intends to go it's hard to commit to anything specifically."