The Rhapsody of the Seas (Royal Caribbean) which leaves from Galveston on 10/28/02 is a "gay hosted" cruise (Key West, Grand Caymen, Cozumel)
I'm not sure who the actual "host" is, but I know they have over 150 people already signed up and expect 200-400 total. A friend of ours is the "gay cruise director" for the week. He said they'll be having "gay bingo" and some other stuff - but I don't have the details.
My lover and I took the cruise in August: a great ship and staff, but 400 kids! - it was the last week before school started - and had a great time.
And the rooms are CHEAP!