First the bad news: DayZ was absolutely, definitely hacked. That happened. After an initial period of being cosigned to Reddit rumor status, Bohemia's confirmed to RPS that DayZ's servers were compromised in some significant form or fashion. Initial reports pegged the hack attack as a full-on swiping of source code (which will also be the title of George R.R. Martin's eventual cyberpunk novel after Game of Thrones takes his life and he returns as a nano-borg), but Bohemia has yet to enter panic mode. Instead, a rep told me that both players and development of the game are completely unaffected.
Here's Bohemia's full statement to RPS on the matter:
"We have recently detected an attack on some of our servers, the precise nature and scope of this attack is currently being extensively investigated. There were no user data on any of the servers. Current development goals and schedules for our games will not be affected by this attack."
"More information will follow as our investigation continues."
Which is a bold stance to take, given that - if source code was indeed pilfered - all sorts of nefarious cheating, botting, and hacking tools could be on the way. Maybe the source code is safe and sound and this is nothing worth stirring up a fuss over, but the alternative is that Bohemia's just trying to keep things quiet until it can prepare an adequate response.
I've followed up with more questions about the at-a-glance nature of the hack, especially where possible cheats, hacks, and other sorts of intrusions into the game are concerned. I'll update this story the second I hear more - or possibly a few seconds before if I find, like, a really good picture of an owl that I can't wait to show you.