Web 2.0 Web sites accounted for 12 percent of all U.S. online traffic for the week ending April 7, 2007 according to a new study from Hitwise. That number represents an increase of two percent compared to two years ago. In the past two years the market share of visits to those sites have increased 688 percent. Certain Web 2.0 properties are dominating their category, like Wikipedia who ...

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