Reuters: “Hearst Sues Over Use of Cosmopolitan Name“:

Hearst Corp filed a $500,000 trademark infringement lawsuit on Monday against the developers of a $3 billion Las Vegas resort and casino using the same name as the publisher’s well-known Cosmopolitan women’s magazine. . . . The defendants, Cosmo Senior Borrower LLC and 3700 Associates LLC, are developing the Cosmopolitan Resort Casino, scheduled to open in Las Vegas in 2010 . . . In its complaint, Hearst said that beginning in September 2004 the defendants had secured or applied to register for some two dozen trademarks using Cosmopolitan or Cosmo.

Las Vegas Trademark Lawyer commentary here, noting that Hearst and the resort had tangled previously in the TTAB.