Backwards Speech: Check out this post for a sound clip that features a backwards message. In one of Desmond's psychic flashes, you can hear Hurley saying "Can you hear me?" in reverse.

A Familiar Language: Naomi, the mysterious woman who landed on the island, had a Portugese copy of Joseph Heller's Catch-22. This could be an indication that Naomi works for Penny, since the two men who called Penny in "Live Together, Die Alone" spoke Portugese.