Online ad revenues recorded 25 percent year-over-year growth for a $5.2 billion dollar performance in the third quarter, according to the IAB. Growth from last quarter was a less impressive 3 percent, however. The Internet is on pace to break $20 billion in ad revenues this year, compared with $16.9 billion for 2006. The first nine months of the year generated $15.2 billion in online advertising. Paid search represents a steady 41 percent of revenues.

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About The Author: Greg Sterling is a Contributing Editor at Search Engine Land. He writes a personal blog Screenwerk, about SoLoMo issues and connecting the dots between online and offline. He also posts at Internet2Go, which is focused on the mobile Internet. Follow him @gsterling. See more articles by Greg Sterling