Yahoo!'s IntoNow app uses your phone's microphone to identify whatever TV show you're watching in real time based on the show's audio track. Once the show has been identified, you can use IntoNow to find out which of your friends have already seen the episode you're watching or which happen to be watching the same show at the same time. All roads lead to discussing the episode in question though not until the commercial break, of course. You don't want to miss any important plot twists or riveting reality-show banter.