its currently in closed beta. Its a Korean game by XL Games.
been digging around and this is what i found:
Archeage is created as a Sandbox - kind of games, where the player is free to do anything he wants in the game world. Of course, there were sandbox games before Archeage, but Archeage puts this on a new level, with way more social possibilities. Archeage is also the first MMORPG, to have sea navigation and land traveling as one of the key aspects. We wont explain how the ships work here, but you will have an enormous, seamless world in Archeage, with a possibility to build your own townships, which renders each server unique. Players will travel around the game world, and fill up their own map, with the aid of special instruments. This way players will have a possibility to mark different towns on the map, lay their own roads, sell their knowledge on the world to other players. Appart from the housing system, you can also plant and cut trees, along with managing your own garden. One of the best features of Archeage is game physics. Archeage will be the first MMORPG to have physics making a great impact on the game world: you can knock your opponent of a mountain, push him by moving on him, or just hit a bridge with a meteor rock to break it, while there are players on it.
It will have classes with skill trees, similar to SWG. But so far i've only seen combat classes. You'll be able to mix and match skills from all the classes.
Interesting Housing video here showing player teamwork:
And here is a first impression review of the beta experience, with some great pics:
Here is an all-that-you-need-to-know post about the current state and the idea of the game. Contains more screenshots, information on classes, skills, transportation and more.