MarketWatch: Several Internet giants are said to have inquired about buying Flipboard, maker of a newsreader app that has recently signaled it is open to acquisition discussions. In recent weeks, Google and Yahoo have both reached out and held early discussions with Flipboard. Those talks have involved ideas around how products could be integrated, but they haven’t evolved to a price. Talks with Twitter went further, discussing a deal price of about $1 billion. But those negotiations, which began months ago, have largely stalled since April.