Hi Dan,

The two major cruise forums are:

CruiseCritic.com
http://boards.cruisecritic.com/

CruiseMates.com
http://www.cruisemates.com/forum/


If you're looking for message board catering to luxury cruises, there are two options:

Luxury Cruise Talk from Brown & Keene Travel
http://www.LuxuryCruiseTalk.com

Gold Standard Forum from Eric Goldring Travel
http://www.goldringtravel.com/forum.aspx


Cruise Critic definitely gets the most traffic so it's an excellent place to begin. Happy cruising!

Andrea