The fist week 2 about google, 1 about yahoo

"Earlier this week, comScore released its January 2008 qSearch paid click report, which showed a 7% sequential decline vs. December ‘07, and a flat annual growth in paid clicks for Google. Moreover, the number of paid clicks per Google search query declined by 8% from December to January, suggesting that consumers are clicking less on search ads, possibly reflecting a weaker buying appetite."
Related: Google to ComScore: You owe us $15-billion, Google: the hollow echo of a click, Google housecleaning explains ad drop

"A recent report on Click Fraud suggests that the maximum number of invalid clicks on Pay Per Click ads originate from India. And this is not the first time - its widely believed there there exists a large 'work from home' crowd in India who want to generate 'quick cash' by clicking Google AdSense ads."

"Code-named 'Search Monkey,' the new open-source application programming interfaces (API) that Yahoo is slated to detail today will allow Web site owners to add information such as ratings and reviews, images, deep links and other data directly to the Yahoo Search results Web page."