http://www.missing-ink.com

Been playing this, but mostly building. I really like the building, especially the destruction bits. You can use a giant cannon ball to take out whole walls, etc.

On the flip side, the combat in the open world. It kind of sucks. So do the controls (for me, the non kb/mouse user).

Definitely worth a try. It's free, so you have no excuse not to. =]

I am really intrigued by the building. You can just buil whatever and people can come visit?

Not yet. Building takes place in another plane, at this stage of the alpha. The combat and adventuring are open world, though.