Hi there!
So, you're going to Hawaii. Good for you!!
I've been twice, to Oahu, Maui, and Kona for the IM World Championship, last October.
For Oahu, do the Diamond Head climb. Was really neat. And not a difficult feat at all. Hanauma Bay snorkel is the best for safety, too. If you can take your own snorkel mask, is better than renting. And, don't forget the aqua shoes. You'll need those for safety on beach and in the water.
On Maui, don't miss the Maui Ocean Aquarium. Was the best I've ever seen!
Best luau in Lahaina, called the "Old Lahaina Luau". Also, in Lahaina, go see the theater production "Ulalena". Is the story of Maui's beginnings done like a Cirque de Soleil show. Was fantastic!! Buy the music CD, too!

Last tidbit, go to your library and get the book "Hawaii for Dummies".
Is what I used to plan our trip. Knew exactly where we wanted to go, and had reviews and phone numbers and websites. You should book your luau before you go!!

Have fun!!

PS Check out my new line of handmade Triathlon jewelry, just for Tri Women! Very unique! I think you'll like what you see! Go to http://beadbewitched.artfire.com

Deb