Online ad spend hit $6.4bn in the US in Q3 2010

"Online advertising revenues in the U.S. hit $6.4 billion in Q3 2010, representing a 17 percent increase over the same period in 2009, according to estimates presented moments ago by the Interactive Advertising Bureau in tandem with PricewaterhouseCoopers.
This marks the highest quarterly result ever for the industry.
This is not the first time IAB and PwC got to announce record numbers this year.
Last month, they said Internet advertising revenues in the U.S. were at $12.1 billion in the first half of 2010, setting a new half-year record that represented an 11.3 percent increase over the first half of 2009."
Source:  Techcrunch, 17th November 2010