Well it's been more than a month since I went but since this thread was dragged back out I guess I'll mention that we went to the Dole Plantation, shopped at the International Marketplace (actually hotel was right behind it), went to Kailua beach and went kayaking, went to Kualoa Ranch, spent a day driving around the island and checking out the North Shore, hiked up Diamond Head Crater, went to the Bishop Museum and Iolani Palace, went to the Polynesian Cultural Center and Pearl Harbor, and went snorkeling at Hanauma Bay....I'm sure we did other stuff as well but I can't remember it all.
I loved the Dole Plantation and Kualoa Ranch. The rest of the trip wasn't good, for a variety of reasons. I loved the weather very much, but otherwise I'm not a big fan of Hawaii.