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On Google's Horizon ... Microsoft Execs at the world's favorite search engine are predicting stormy seas ahead. Does it have anything to do with Microsoft's charge into search and online ad delivery? &lt;FONT face="verdana,MS Sans Serif,arial,helvetica" size="-2" color="#666666"&gt;&lt;B&gt;-washingtonpost.com&lt;/B&gt;&lt;/FONT&gt; 