UPDATE: We have decided on a location, for reals. The ceremony will be on Waimanalo Beach, which is a short drive from Waikiki. See the map below, and click here for general directions.
We will be staying at the (quite affordable) Castle Ocean Resort Hotel Waikiki, which is in Honolulu on the island of Oahu. The hotel is around two blocks from Waikiki beach, as shown below.
We will be married either very nearby or a short distance away, so the location of our hotel is currently the best information we have. We will be updating this section as our plans become more refined.
Setting aside the amazing beach down the road, which has been partially walled off to provide a better swimming environment for small children and those who would rather not worry about big waves crashing down, the Honolulu Zoo is a short walk, as are the best shops and restaurants on the island. There's also a LOST tour!
There are some great deals right now on travel and lodging in Hawaii. We recommend checking out TravelZoo (especially their Top 20) and Expedia. Also, Off2Hawaii has some good vacation packages, as does Pleasant Holidays, which is offering great deals on three-night hotel and airfare packages.