IntoNow from Yahoo is a "second screen" app -- an app you use on your phone or tablet while watching TV to get more info about the shows your watching. In early versions of the app the big feature was that IntoNow could "listen" to the audio from your TV and accurately figure out what you're watching, kind of like the Shazam app does for audio.
In this latest update, Yahoo has added a couple more features to the app that give you more reasons to watch TV with your iPhone or iPad in your hand.
Like the earlier versions of the app, you can touch a button to synchronize almost instantly with a TV show or live event (with amazing accuracy), simply by letting the app listen to the audio. Doing this "checks you in" to the show, letting your friends know what you're watching and surfaces available tweets, community discussion, and other information specific to the show. I tried using the app next to a TV showing the Summer Olympics and immediately IntoNow knew what I was watching, let me "like" the broadcast, and displayed several items specific to the Summer Olympics. The app scoured Yahoo sites to give me medal counts, event schedules, related tweets, and stories about Olympians -- all in a matter of seconds. I also had the option to add and chat with friends (via Facebook, Twitter, Gmail, or my address book) so it would allow me to have conversations with other users watching the show and a neat way to connect with friends from our respective living room couches.