Link to April 8 Wall Street Journal article.
Excerpt: U.S. online-ad spending reached $6.3 billion during the fourth quarter of 2009—the largest quarter on record for Internet advertising, according to a report released by PricewaterhouseCoopers and the Interactive Advertising Bureau, a trade group of media and technology companies. Spending during the fourth quarter increased 2.6% from the same period in 2008.
Display ads (graphical ads that border Web sites): +4% to $8 billion. in 2009.
Online video: +38% to $1 billion.
The bad news:
Classifieds: -29% to $2.3 billion.
Lead generation: -14% to $1.5 billion.
Email ads: - 28% to $282 million.