Nice, please can it be one large map, not a separate small "build" map and a "mining" map.
It will be one central map with the nether and the end. But there may be another map in time for some cool events We shall see about that though...
As Saf mentioned in the comments this is a new map so there won't be any porting of items/builds to the new Vanilla server when it arrives. Just thought I would make that clear as the post isn't.
Full details shall be arriving soon once we have finalised the server and figured out what limitations 1.4 brings if any.