Dean and the Day Z team have a video up of one of the talks they gave at Pax this year.  It starts off with explaining some of their progress and reason for the delays then features a fairly lengthy Q&A session, which is extended into the hallway after.

I’ve managed to resist getting the free mod, opting to avoid all the hacking and griefing going on. I am looking forward to the stand alone, official version though. Having watched so many Day Z gameplay diaries on youtube and various gaming sites, I really want to give it a go. Will definitely be one of the alpha customers.

Also worth a look is the new Ship wreck location, planned to be included in the standalone.