The first rule of Manhattan real estate -- of real estate in general -- is said to be "location, location, location." Which, as conventional wisdom goes, isn't the silliest thing in the world. But Manhattan real estate observers could be forgiven, in recent years, for believing that at least one of those "location"'s could be swapped out for "branding." New Manhattan neighborhoods are nothing new -- New York City is a study in flux, and all it takes is one zoning decision and a few bold luxury rental developers to turn a neighborhood like the nowheresville around the Lincoln Tunnel entrance into "The Linc," a newly branded neighborhood complete with its own green luxury rental listings and superstar new rental developments such as Emerald Green. What sets Hudson Square apart from The Linc, besides a much cooler name -- The Linc? You're sure about that? -- is that this new neighborhood is actually one of Manhattan's oldest neighborhood. Hudson Square is, for all intents and purposes, West Soho. And it's not exactly "new," either, given that it has been around for centuries -- the Ear Inn, one of Manhattan's oldest nightspots, is a Hudson Square landmark -- and was Manhattan's printing district back when Manhattan had things like printing districts. But a recent re-branding campaign has helped Hudson Square re-make itself as one of the hotter residential neighborhoods in lower Manhattan, and a new campaign to remake the city's streets into leafier, more pedestrian-friendly thoroughfares suggests that it's time for all of us -- those looking for apartment rentals in SoHo and those of us who just dig NYC real estate -- to give this old-new neighborhood a new look. So, yeah: let's look at Hudson Square.