At Cruise Shipping Miami, which I was unable to attend, there was a gigantic cut-away model of the Oasis of the Seas. I have been looking through photos of it and it is amazing.
One thing that has struck me as odd about the Oasis of the Seas marketing scheme, is the lack of information about the dining room. This area must have to be enormous to handle the 5,400 pax (double occupancy). I noticed that the cutaway does show the dining room. 
(The above photo and others can be found at this CruisePage.com photo album )