The low-slung Port Authority bus terminal will be getting a heady addition: The Port Authority will announce a deal for a tower to be built at its north end. The NY Times reports that Lawrence Ruben Company and Vornado Realty Trust is buying air rights for $400-500 million, which the Port Authority will then be used to add 18 bus platforms, give the terminal a "major face-lift" and overall refurbishing. Well, finally - commuting to......