http://kotaku.com/5223889/the-best-m...see-in-a-while

I read that this is being built by one guy. You basically play in an empty world where every player has the ability to shape the land around their area to create their own personal city with infrastructure and defenses. Basically a sandbox MMO.

Each server is said to hold up to 200 players each, and there will be AI's in the servers building stuff and reacting to your presence and technology.