The USA: Most linguistically diverse country on the planet?

When asked to name a linguistically diverse place, I would have said Papua New Guinea, and if asked to name a stereotypically monolingual country, I would have named the USA.  However, this recent report from the New York Times suggests that, due to its large immigrant population, New York harbours more endangered languages than anywhere else on Earth (tipped off from Edinburgh University’s Lang Soc Blog).  From a field linguists’ point of view this may make discovery of and access to minority languages much easier (although may mean the end of exotic holidays).  From a cultural evolution point of view, a more global community may mean a radically different kind of competition between languages.  Nice video below: