Desmond's order when he's talking to Hugo is number 42 - one of Hurley's Numbers.
Hugo's mention of the upcoming charity event for "The Human Fund" is a nod to the Seinfeld episode The Strike (1997), in which George Costanza invents the fake charity.
Hurley is supposed to meet a girl named Rosalita at a restaurant named Spanish Johnny's. Both are references to the Bruce Springsteen album "The Wild, The Innocent, and the E Street Shuffle," Rosalita being the title of one of the songs and Spanish Johnny a character referenced in another.