Cruisecritic.com
Try out the cruise critic website. It runs using the same software as FT, but it's a bit tougher to navigate. Click on the link that says 'Boards' near the top left of your screen.
The discussion activity is as high as FT - you'll get an answer pretty quick.
p.s. - planning a cruise to NZ and OZ this winter through HAL. flying on our points and staying pre-cruise at Starwood on the SPG points I've got! ^