people have said they heard things in the whispers of other previously deceased people... don't remember what they are supposed to have said... pretty interesting

maybe hurley was libbey's dave and he "got sick" because of some trauma, and doesn't remember things... or maybe libbey's dave is the guy in hurley's flashback somehow, and either hurley was the reason dave died, or libbey made him up because of some connection she has with hurley, or something... so many possibilities :\
i dunno, i really wish they had gone into more flashbacks for libbey... maybe we'll get more for hurley and they'll answer some questions...