Hawaii is a very special place, and I'm sure you will enjoy your visit here. This page provides a biased, personal perspective on Oahu.
There's lots of stuff on the net about Hawaii. Here's some useful links to get you started.
Obviously, there are a zillion places to shop in Waikiki. However, there is also a very large, very beautiful outdoor mall located close to Waikiki called Ala Moana. There is a shuttle every 15 minutes from the hotel that costs $1.00 each way.
The hotel provides a business center with an Internet connection (charge is $20/hour). However, there is also an Internet Cafe called Fishbowl Internet just a few blocks from the hotel at 2463 Kuhio Ave. (charge is $6/hour).
One of the great things about Hawaii is the food. A friend told me once that Honolulu has the same number of restaurants per capita as San Francisco. I don't know if that's true, but here are a few of the many good restaurants that are close to the ISERN'2000 hotel.
Day trips and other things to do
If you have more time before or after ISERN, there's a LOT to do and see on Oahu. Remember that Waikiki occupies about 1% of the total area of the island of Oahu. You are missing a lot if you don't check out some of the other parts of the island.
To accomplish this, however, you'll need a car. You'll also probably want to invest $5.00 in "real" maps of the islands---the maps supplied with rental agencies are generally terrible. You can buy one at the ABC stores in Waikiki or at a bookstore. Once you have wheels and navigational aids, the following are some fun things to do:
This is a great day trip. Do it as a circle: go out via H-2, and come back along the shore via Kaneohe. (or vice versa.) Stop at all of Sunset Beach, Banzai Pipeline, and Waimea Bay to check out the best surfing in the world. Stop at Three Tables and Shark's Cove to snorkel and just generally hang. Stop at Kua Aina Sandwiches in Haleiwa for excellent burgers. Stop at Matsumoto's shave ice in Haleiwa for shave ice and t-shirts that say "I ate shave ice at Matsumoto's in Haleiwa."
If possible, avoid going to the North Shore on Saturday or Sunday; the road is only 2 lanes and traffic jams happen frequently.
Kailua Beach is supposedly the fourth nicest beach in world and rated number one in the USA in 1998 (and it's just six blocks from my house :-). I don't know about rankings, but it's darn fine. You can rent a windsurf at the beach during the week and play around with it. Bring snorkel gear and look for sea turtles.
Lanikai Beach is just around the corner and is utterly spectacular (rated number one beach in the USA in 1997). You can see the sun rise from between two islands just offshore.
Bellows Beach. Closed during the week. Open on weekends. A great spot for boogie boarding.
Pali Scenic Outlook. When taking the Pali highway over to Kailua, definitely stop off at the outlook. There's an easy hiking trail that leads off down the "old Pali road".
Mt. Olomana Hike. This is one of the most spectacular hikes on the island. It takes about 90 minutes each way, and is not for those who are afraid of heights. The Mt. Olomana web page provides detailed directions and some pictures.
Makapuu Beach. This is a world class boogie boarding spot with a really vicious shore break, and lots of people break their necks here. When people aren't doing themselves permanent bodily injury, it's really fun to watch them.
Makapuu Point Lighthouse. About .5 miles back along the road towards Hawaii Kai from Makapuu beach, there's a road leading off toward the Makapuu Point lighthouse. This is nice, easy, 1 hour hike round trip. Park your car by the side of the road by the other cars. Coming from town, the road is about .5 miles past the Hawaii Kai golf course, halfway up the hill to the point.
Sandy Beach. Good surfing and competition kite flying. I don't go here much, but it's not in my neighborhood :-).
Electric Beach. Right across from the electric plant off H-1 going to Makaha. The beach is nothing to speak of, but about 50 yards out there's a hot water outlet from the electric plant and *amazing* snorkeling. It's like you're in a hot tub with about a bazillion brightly colored fish.
Yokohama Beach. Far western side of island; absolutely stunning; I've seen whales 20 yards off the beach there. There's a 2 mile hike to Kaena Point that's gorgeous but dehydrating; bring lots of water.
You can rent boogie boards and snorkeling equipment on Oahu and drop them off on Maui from Snorkel Bob's.
Some final advice, from an email I wrote to a friend several years ago: Lock your car, don't bring expensive jewelry or things, travel light, sleep a lot, take your time, wear sunscreen, listen to slack key music on 105.1 FM, look for rainbows, and be open to the startling range and expression of cultures. Stay outside and get wet if it rains. You'll dry.