Online ad spend in the US hit $7.3bn in Q1 2011

"Internet advertising revenues in the U.S. hit $7.3 billion for the first quarter of 2011, representing a 23 percent increase over the same period in 2010, according to figures released today by the Interactive Advertising Bureau (IAB) and PricewaterhouseCoopers (PwC). This marks the highest first-quarter revenue level ever for the industry and a significant increase over last year’s first-quarter revenue level, which had been the highest on record to date.
“The consistent and considerable year-over-year growth we’re seeing demonstrates that digital media is an increasingly popular destination for ad dollars, and for good reason,” said Randall Rothenberg, President and CEO of the IAB. “As Americans spend more time online for information and entertainment purposes, digital advertising and marketing has emerged as one of the most effective tools businesses have to attract and retain customers.”
“The year-on-year 23 percent increase in first quarter revenues is not just impressive in its own right, but especially so when you take into account the fact that 2010 was a record-breaking year itself for Internet advertising revenue,” said David Silverman, a partner at PricewaterhouseCoopers LLP. “These numbers indicate that the interactive advertising field hasn’t simply bounced back since the recession; it’s growing with dynamic energy.”"

Source:  Press release from the IAB, 26th May 2011