Crain’s New York Business: Google has signed a letter of intent to take about 250,000 square feet at Pier 57 on the Hudson River, which is being redeveloped into a retail, office and park space by a partnership between the real estate investment firms RXR Realty and YoungWoo Associates. The footprint of the entire development is around 560,000 square feet. About 300,000 square feet of office space will be built in the hangar-like building that sits atop the pier, which juts into the Hudson River at West 15th Street.