Pre-release patch notes. The patch is scheduled for February 12.

Server rentals are live! You can access this from the Play Game > My Servers menu.
You can now invite up to 10 players to your party! To do this press the tab key and then left click a players name. Then select Invite to Group.
Group and Clan members now show their location on the map.
A Vault has been added to Safe Settlements, you are able to access your Global Inventory via NPC.
A General Store has been added that allows you to access the Marketplace via NPC.
Weapons have been added to the game: Mosin Rifle, Colt 1911,
New totally redesigned item spawns.
Fixed a server hopping exploit.
Optimize server browser ? Should load the list of servers faster.
Fixed an issue with notes remaining visible after being killed
It is no longer possible to reload while your clip is full.
Fixed a bug that allowed users to have their names displayed when not being targeted.
Optimized clans UI
Fixed a bug with backpacks where weight was not updating when moving items into it.
Art: Improved the lighting in Colorado
Added more zombies to increase the difficulty of good loot spawns.