I've turned off the TV during the trading day -- got to be a major distraction for me and I've become a better trader....besides by the time the news hits TV or a website or an RSS feed, the market's already made its move[1]....so price/vol data really is what matters.
That said, I always know when the 'major' news comes out -- ie, big earnings, major econ reports, interest rates, etc -- so I can trade or at least be prepared accordingly. And yes, I do scan a few blogs and news sites to get a feel for things and the periodic 'trade the news' item or two.
[1] - CNBC lagged (I think it was) AAPL earnings a few quarters ago by like 8 minutes. If you traded off the TV you'd have bought @ the highs and lost the next day.