Mike Steinberger has an interesting article in Slate about Daniel Oliveros and Jeff Sokolin, two prominent NYC wine dealers who specialized in very old and very famous wines (for example, 1945 Mouton Rothschild in magnums).
It seems that their dealership may actually have been a major source of counterfeit wines; this ties into the Koch/Rodenstock affray, previously noted in this space, and well summarized in the article.