Hilton Hotels Corp. is extending its Waldorf=Astoria brand with the announcement of a new property of that name to be built in Orlando, Fla. The 500-room luxury resort will be built at Bonnet Creek just outside Disney World, along with a conjoined 1,000-room Hilton. Scheduled to open in 2009, this will be the second Waldorf in the world, joining the original in New York.