If you go onto the Princess Cruises' web site you will be able to find the excursions for your cruise. If they are not ready yet keep trying because as soon as they are ready you will be able to see and, if you want, book them. It is a site that you should visit so that you can start reading about and planning your cruise well in advance and learn loads about the ship and practices ... regards Nei.
We did this trip on the Sea Princess in Jan 07. Info for the excursions won't be available till much nearer the time. Keep trying the Princess site later this year, they do send a brochure but you may need to ask for it. By the way, we had a great time - hope you visit Princess Cays for the barbecue/ swim - great fun & free.