Carnival did announce moving the Triumph to New Orleans to add back a 7 day to the 4/5 Fantasy that is already there.
However, (sadly) lack of bookings made Carnival change their mind. The Triumph is enjoying great booking success in Miami and the people just did not respond as strongly as Carnival needed for them to make the change to New Orleans.
I now predict that a 7 day cruise won't be added to New Orleans until at least Spring 2009.
Carnival tried....the cruising public simply did not support it yet...but they will soon!!!