katallo, thanks for posting the information. I also received the email, but wasn't sure if it was legit, because it didn't come from Starwood. Then I tried to enter the code online, but got invalid, and tried to call the number in the email but it just rings and rings.
Anyone had any luck with it? If so, how did you book? What is the "complmentary upgrade? I've got another resort already booked but might consider switching for a great deal. We've stayed at the Dolphin before and it was OK.