For those wondering why it isn't all "just Disney"---it's important to remember that the various business units in the company are each expected to turn a profit *on their own*. For example, Parks & Resorts is judged separately from the Studio division. A really good year at the box office doesn't mean that it's okay that the parks have lost attendance this year.
What's more, that happens *within* business units too---Disneyland resort has to be profitable independently of Walt Disney World, and vice versa. One consequence of this arrangement is that DCL has to be "paid" by DVC for each DVC member who takes a cruise. That is a "cost" that goes against DVC's books, which must be offset by rental receipts from the rooms turned over to CRO for reservation-point bookings.
This isn't (as much of) a problem for booking at other WDW or DLR hotels, because they, too, have been renting for lower prices. The problem only shows up when one price (DCL cruise fares) goes in the opposite direction of another (WDW hotel rates). But, that's absolutely what is happening. The Wonder is getting *much* more per night for Alaska than it ever did out of Florida. And, now that the Dream is coming on line, a lot of people who did the Bahamian cruises before are thinking they might want to try the new ship---my wife is paying about 35% more in 2011 for a 4-day Bahamian than she did in 2010, and that cruise now only has verandah staterooms left, more than 9 months prior to sailing.