Harrah's Entertainment, Inc. (NYSE:HET), the world's largest casino entertainment company, along with world-renowned singer/songwriter Jimmy Buffett, today hosted a press conference to announce plans for a new Gulf Coast destination; Margaritaville Casino & Resort on the shores of Biloxi. The project investment is $704 million. Jimmy Buffett performed two songs at the news conference. Governor Haley Barbour and Biloxi Mayor A.J. Holloway also spoke at the event.