There's now an early access listing on Steam for H1Z1, saying SOE's free-to-play, DayZ-style zombie game will begin allowing entrance to players on Thursday (thanks Blend Games). Here's word on the early access version:

NOTE ON EARLY ACCESS ALPHA:
H1Z1 is currently in Early Access on Steam. With a fully transparent approach to game design and development here at SOE, we want to transform the way our players interact and participate with our games. H1Z1 Early Access is your chance to experience and make a difference in H1Z1 as it evolves throughout the development process.

The H1Z1 development team will continue to create new features and may make significant changes based on the needs of the game. Those who choose to purchase Early Access should anticipate an evolving feature set, bugs, incomplete content, missing features, and potentially game breaking issues. Early Access is designed for those wishing to support the ongoing development of H1Z1 and be a part of shaping its future.

GAMEPLAY
Enter a world that has been overrun by zombies and fellow survivors since the H1Z1 virus outbreak. Fight for your life against the infected and against the brutality of others as you attempt to live and see another day. Every moment is borrowed time with one question to answer… Will You Survive?

Visit the H1Z1 website for more info!