Pam, I've been thinking same thing! I'm assuming any cruise can get broken up into at least segments of 14-21 nights.
A lot to put on Ngaire now, as she's on a cruise. So we can start to talk, at least! There's a lot out there for what is released so far. Maybe best if others just throw out their ideas!
in early 2015, what I see in the book I brought home from the MARINER cruise is in the Caribbean on the Navigator, South America on the Mariner, and Asia and South Pacific on the Voyager. Have no idea what is on the Silversea Explorer that Ngaire has been booking for some time now for groups.