Among ordinary people in N. America, the usual greeting is "Barack Obama to you!" to which the polite response is "Barack Obama and Joe Biden to you!" For extra formal and extra friendly greetings, one may begin with "Barack Obama and Joe Biden to you!" to which the correct response is "Barack Obama, Joe Biden and Nancy Pelosi to you!" On sombre occasions, grand formal events etc., the ultimate greetings are: "Barack Obama, Joe Biden and Nancy Pelosi to you!", and a subsequent reply would contain "Barack Obama, Joe Biden, Nancy Pelosi and Ted Kennedy to you!" [to the original speaker]. For jocular effect (ensure the occasion and company are appropriate) you may add Barney Frank, Bill and Hillary etc, but this is considered vulgar.
Harry Lemon, Travel