whoa!
http://www.greavesindia.com/special_offers/index.html
Four Seasons Resorts Of The Maldives - “Free Cruise”. Stay 3 or more nights at any Four Seasons Resort in the Maldives and receive a complimentary 3, 4, or 7-night cruise on the Four Seasons Explorer vessel. This offer is valid for any resort stay between 12th April – 20th December 2010
now presumably its still the half off, instead of free, but this is NOT on the FS site right now.