Hi schnitzer,
Lot of resources on the web. Check out the Gay & Lesbian Cruisers subboard under Special Interest on the Cruise Critic website, and then do a search. Tons of posts on all the different cruises.
http://boards.cruisecritic.com/forumdisplay.php?f=162
Also, the MSN Atlantis board is very good:
http://groups.msn.com/atlantisevents
I wrote a long review of the Atlantis Baltic 2007 last year here on FlyerTalk, and you may find it informative. You'll have a great time. Barcelona to Rome is usually a younger, more party oriented crowd than Baltic. Do try to see some of the ports if you can
http://www.flyertalk.com/forum/showt...05#post8134105