Hi,
I think that the Costa Deliziosa sails a world cruise leaving Savona, Italy in early January 2013 and the Costa NeoRomantica is supposed to leave for a world cruise somewhere in late autumn 2012, also from Savona, Italy. I was on board the first one mentioned and it is a great ship (less than 5 years old). I have my doubts about the NeoRomantica for a world cruise , as it is much smaller; but on the other hand ot just underwent a complete make-over.
Hope you can find something...