I like to travel in cruise ships, but for me it's usually hard to decide on an itinerary. I've never found a web site that allows me to compare cruise trips, so I have to search in many cruise companies (Costa, MSC, Royal Caribbean...) and compare their fares and itineraries.
It seems to me that cruise planning is not as advanced as flying. Last time I took a Costa cruise (it was a little over 1 year ago) I couldn't buy it online! I had to go to a travel agent and buy through it. Even though, I suspect there should be a website to help those that want to cruise, but I'm just not aware of.
Specifically, I'm looking for a tool like Skyscanner, Adioso, Kayak (and the like), that would allow me to enter a date (or a date range) and places (perhaps a country or a region) and search for cruise ships that would be in those places within the date range supplied.