Online advertising revenue reached 5.9 Billion U.S. dollars in the third quarter, an increase of 11 percent over the same period last year, according to a report by the Interactive Advertising Bureau and PricewaterhouseCoopers. Third quarter revenue was 2 percent higher than the second quarter of 2008. Revenue for the first nine months of 2008 reached 17.3 Billion U.S. dollars, an increase of nearly 14 percent.