We cruised when I was in my six month in 1999 (not on Disney, though). It was one of my favorite cruises! I didn't get motion sick (although I had looked for ginger pills that I read about before going -- couldn't find them and figured ginger ale would have to do). The food was wonderful and I had a voracious appetite! And we met and talked to more people than ever before. So many people struck up conversations asking about the pregancy and the trip, etc. My husband and I had a wonderful trip!