Harlequinnut:
Me and my girlfriend were there last summer...It was simply amazing!
She did the dolphin swim, I didn't. The bird sanctuary is really cool. THe birds come and sit on your head, arms, anywhere and will eat from your hands.
The snorkel lagoon is amazing. Soooooo many fish....foot long angels, tangs, etc.
I have 3 rolls of film from when we went their. I could scan some of them for you if you were interested in seeing anything specific in the park.
Also, any specific questions, fire away!
Bottom line, you'll love it. We planned the whole trip around it.