In a new kind of TV programming guide, Boxfish's iPad app, which went live in the Apple App Store Tuesday, presents "a constantly updating stream of trends and topics – think Tweetdeck, but for live TV" -- to see what's being discussed right then on 3,600 TV stations, writes Janko Roettgers. "And the app can be synched with a TiVo or a DirecTV set-top box to help users change the channel every time they want to tune into a conversation. However, there’s no esy way to filter out channels that a subscriber doesn’t have access to."