Microsoft's Bing search engine took a 17.4% piece of the U.S. search engine market in May, according to the latest comScore data provided by Macquarie Capital in an investors note. Google's May market share rose 0.20 points from April to 66.7%. The stats do not include mobile searches, which comScore believes account for between 25% and 30%. The company will release the stats to the public on Wednesday. Read the article here.