Bookings for the Oasis Of The Seas will open on August 21 for diamond and diamond plus members of the C&A society. Platinum and Gold members can book starting on August 28, and the general public on September 3.
But the big news to me: according to the e-mail invitation I received, the deck plans will be available for C&A members to view on August 20. Not sure if they will be sanitized and only show cabins, or if the whole ship will be viewable. Given RCI still has some neighborhoods to roll out in press events, if that doesn't happen before the 20th then I expect to see a lot of blank space on the deck plans.