Business Travel; A Web site allows travelers to create an interactive guide based on data from Fodor's

Preview Travel Inc, whose World Wide Web site has traditionally focused on vacationers, is wooing business travelers; it is only business travel Web site that allows users to create interactive guide to destinations based on data from Fodor's Travel Publications' Gold Guide series of books; Regency Hotel in New York, flagship property of Loews Hotels, is undergoing $25 million renovation, its first in 10 years; June Langhoff, freelance writer who specializes in high-tech issues, is author of new book, The Business Traveler's Survival Guide (Business Travel column) (L)