There is also the issue of exchange rate - US Dollar versus Euro. Of course Disney <i>could</i> contract with an American shipyard to build it..., but it seems like all the cruisers built recently are all continental built. What seems like a break in British tradition - Cunard - is the QM2 is being built in France.
Unfortunately, I think, our "labor" situation has made it financially impossible to build ships domestically, except perhaps military vessels where the price is not as much a concern (and security is).
I also read where RCCL has just contracted to build an Ultra-Voyager, something like 160,000 tons for delivery in 2006. Carnival/Princess are also building an Ultimate Caribbean Princess in the 170,000-180,000 tons range and carry approximately 3,600-4,000 passengers, slated for 2006 or 2007. The Caribbean business is there, but I do not know what the West Coast outlook is like - I guess one could compare how many ships are arriving on the East Coast versus the West Coast and come to our own conclusions.