I was randomly watching the "Long Con" on Sci-fi the other day (obviously a Sawyer episode) and I noticed something pretty funny. Towards the end of the episode Hurley is sitting around a fire when Sayid comes up to him and says he thinks he fixed the radio receptor (don't know exactly what its called). He turns it on and first gets Rousseau's message and then a very old song possibly from like the 1920s or something. Hurley comments that it sounds so clear that it has to be coming from somewhere close. Sayid says that radio signals travel thousands of miles so it could be coming from anywhere. Hurley then states "or any time....just kidding dude". I just thought that was really funny and a clear foreshadowing for season 5.