SEVERAL RESORTS ON OAHU, the island nicknamed the "Heart of Hawaii," have upgraded facilities or amenities, and some activity and entertainment offerings on the island have been enhanced in time for the winter season. Read on for a few of the highlights; for even more information on hotels, attractions and activities, check out www.visit-oahu.com. 
Ohana Waikiki Beachcomber has completely renovated each of its 495 guest rooms, from carpeting to TVs to bedding to bathrooms. Renovations to the hotel's lobby and Hibiscus Café will proceed later this year.
Kahala Hotel & Resort has unveiled its first phase of room makeovers, bringing an open and airy tropical feel to the guest rooms.
Hilton Hawaiian Village Beach Resort & Spa is refurbishing its Duke Paoa Kahanamoku Lagoon, to be reopened during the first quarter of 2008. The five-acre lagoon is getting a new water circulation system, a boardwalk and landscaping featuring native Hawaiian trees and plants.
The Royal Hawaiian hotel is scheduled to close June 1 for renovations and reopen in late 2008. Spa suites and a "tower within the tower" hotel concept are among the plans. Oahu is now home to the first hotel in Aqua's new Elite brand, Hotel Renew, which was formerly known as Ocean Tower Hotel.
As for sightseeing news, KoAloha Ukulele has partnered with Waikiki Trolley to run nine trips per day to its family-owned and-operated factory. Passengers may take tours.
Can't get enough ukulele? Aloha Tower Marketplace now hosts free lessons on the instrument to all ages, every Saturday from 2:30 to 3:00 p.m.
Bishop Museum has unveiled its Picture Gallery, a collection of oil paintings and watercolors—some of which have not been displayed publicly for decades.
Kualoa Ranch Hawaii now offers a 20-minute, guided "Legends Tour" that takes guests through some of the 4,000 picturesque acres on the property, once a military training base and sugar plantation, now a cattle ranch.