congrats ddogg,
not from hawaii, but as a tourist who was recently there, perhaps some experiences of mine to throw in here.
as suggested, diamond head hike, and the makapuu lighthouse were great hikes. Wife and I enjoyed them alot! If you do the makapuu lighthouse, go down the mountainside near the wale sign thingy (jsut be careful) there are some blowholes down there.. and some stacked rocks. (see if you can find mine, lolz) If you go hiking, go early. like 7am. beat the sun and heat.
we did the polynesian cultural center thing. was good, but we didn't go long enough. But if you do go, spend the whole day there. The show at night is fantastic, and the samoa village show was VERY well done. (quite humorous)
My brother had some "magic" book that had lots of tips for us haoles. lolz.. i think it was the discover hawaii series or something like that. worth getting.
matsumoto's was good too.
just don't let the wife know you are checking out the island protege's.. haha