The Marriott should be added soon, call
DVC and ask them about it. I'd second the direct exchange idea on TUG or on other sites like Timex. I'd also suggest some of the independent's like SFX, Trading Places, Donita's or Platinum Interchange. There are really only 2 timeshares on Oahu to consider as a fair DVC exchange. They are the Marriott and the Hilton. The Marriott is some ways away from the action. DVC previously had choices which they removed from the list.