Has anyone heard of the World's Leading Cruise Lines alliance? A group of cruise lines, including Princess and Carnival have gotten together to offer a "Vacation Interchange Program"...I think it let's past cruisers get specials etc. I'm trying to see if my past cruise with Carnival can count for something on my upcoming cruise with Princess. Any info out there?

landv,

just to add a bit of information to that, the cruise lines forming the "World's Leading Cruise Lines" alliance are all part of one company, Carnival Corporation & plc. Not all brands of Carnival Corporation & plc are part of the "World's Leading Cruise Lines", however.

The alliance's web site has some info regarding your question.