UNDER CONSTRUCTION * Hilton Hotels Corp. broke ground in September on a 600-room property at Boston's Logan International Airport. When the $100 million Logan Airport Hilton and Towers opens in fall 1999, the ten-story property will offer 30,000 square feet of meeting space and a 6,600-square-foot health club.

* In January, Omni Hotels opens the 360-room Omni New Haven (CT) Hotel at Yale. With 22 meeting rooms and a 9,200-square-foot ballroom, the downtown property will host conferences of up to 500 persons.

* In other news from Omni, San Francisco's 1927 Financial Center Building, vacant since 1990, will be transformed over the next two years into the Omni San Francisco Hotel. Located on one of the city's main cable car lines and within walking distance of Union Square and Chinatown, the new luxury property will offer 360 rooms and 15,000 square feet of meeting space.

* Another historic building is being transformed into a hotel in Louisville, KY. Here, the YWCA on the city's Fourth Avenue corridor is under construction to open as a 300-room luxury hotel by the end of 1998. The redevelopment company is Sage Hospitality Resources; management has not been selected, but Marriott and Hilton are among the hotel companies interested in the project.

* In Wichita, KS, adjacent to the Century II Convention Center, the 303-room Hyatt Regency Hotel opened in September, weeks ahead of schedule. Wichita's first luxury convention hotel offers 16,010 square feet of meeting space.

UPGRADES AND EXPANSIONS * The expanded Adam's MarkDenver opened in late August, now ranking as the largest meeting property in Colorado. The 1,225-room convention property has 125,000 square feet of meeting space, including three ballrooms, 50 meeting rooms, and space for 148 exhibit booths.

* This fall, Pinehurst (NC) Resort & Country Club acquired the 102-year-old Holly Inn in the Village of Pinehurst, expanding the resort's lodging options by 45 rooms and 30 suites. A restoration of the historic inn will be completed over the next year and a half.

* In Panama City, FL, construction began in September on the Boardwalk Beach Resort's new conference center, which will host up to 1,800 theater-style when it opens in April 1998. The resort, a collection of four affordable beachfront properties, offers a total of 625 guest rooms.

* Two meeting properties in Santa Fe, NM have changes to announce: First, the Inn at Loretto has changed its name to Hotel Loretto after completing a multimillion dollar renovation. Second, La Posada de Santa Fe has been acquired by Olympus Real Estate Corp., which is expected to make a significant investment in the property.

CARIBBEAN MEETINGS * The Marriott Beach Resorts of St. Thomas--the 408-room Frenchman's Reef and the 96-unit Morning Star Beach Resort--open in late December after a $45 million redesign. The project has added, among other upgrades, 21 new two-story suites at Frenchman's Reef, all with water views. The properties have more than 60,000 square feet of indoor and outdoor meeting space, including a 14,100-square-foot ballroom.

* The 196-room Four Seasons Resort Nevis has added five two-bedroom villas, bringing the number of villa accommodations to 20. The villa accommodations have access to all resort facilities, including its championship golf course, tennis center, fitness center, and water sports.

* Radisson Hotels Worldwide and the Government of Aruba have signed an agreement under which Radisson, manager since 1992 of the Radisson Aruba Caribbean Resort & Casino, will invest in the ownership of the resort and will extensively reconfigure and renovate the property. Plans call for a reduction in room count from 409 to 364; creation of additional suites and a club level; 17,000 square feet of new meeting space; relocation of the casino to the lower lobby, at the foot of a grand staircase; a new spa and fitness center; four new championship tennis courts; and expansion of the swimming pools to create a water recreational area. Also, guest room balconies will be opened up for better views of the Caribbean. The property is expected to close for renovation in March 1998 and reopen in December 1998, in time for the 500th anniversary of the discovery of Aruba in 1499.