A great place for passengers who are about to go on a Cruise to meet and correspond with others who may be going on the same cruise is located at http://www.cruise2.com/MeetingHall.html. You can list your name and email address if you wish and correspond with others prior to your trip. Some of the other passengers may have already sailed on the ship in the past and can give you some tips on what to expect, what to do, where to eat and which land tours to take.
And for those passengers who have already sailed on a cruise there is a location at this Meeting Hall to register so that you can offer people your thoughts about the cruise and talk with others who were on the same cruise and you would like to share some thoughts with.