The Microsoft-Yahoo saga has come to a head. On Thursday Yahoo said that Microsoft was no longer interested in pursuing an acquisition. Microsoft last month offered to buy Yahoo for $33 a share, or about $50 billion. With talks between Microsoft and Yahoo kaput, Yahoo has finalized an agreement with search-king Google in which Yahoo will display some ads sold by its rival in a deal Yahoo estimated would generate $800 million in annual revenue, according to The Wall Street Journal. The deal most likely faces regulatory hurdles.