Here are the stops from the Carnival site:
San Juan, Puerto Rico
St. Thomas, USVI
with days 2 and 7 being at sea. It leaves out of Fort Lauderdale.
For those of you with more time, you could B2B this one with the 6 day and stay on the boat. You'd head to Key West, Grand Cayman and Ocho Rios. I'd really love to do that if I can get the $ together.