DAYZ CURRENTLY NOT RUNNING.
We might return with a server, but atm. dayZ is not really a priority
2015 - an addendum:
DayZ Exile for Arma3 sounds promising - especially with Esseker as map.
Also check out the new "Community Installer" like DayZ Commander was back then in the days:
It is pretty impressive, integrates neatly and should be very familiar to dayZ Commander users, but integrates with steam. Have fun hunting Zombies!