US Intetnet ad revenues up 26% in the first half of 2007

US Internet advertising revenues grew more than 26% to about $10 bln between January 2007 and June 2007, according to PricewaterhouseCoopers LLP. Search engine keyword ads remained the most lucrative, accounting for about 40% of online revenues. Display ads made up 21% of total revenue and classifieds had 17%.Us