Internet's share of ad spending is expected to increase from its estimated 5.8% in 2006 ($24.5 billion with 31% growth) to 7% in 2007.  The U.K. accounts for the largest share of online spending by advertisers, at 13.5%, and is forecast to reach 21.5% by 2009. 

Online Ad spend will hit $42.7 billion in 2009, climbing to 8.6% of oevrall ad market in 2009, according to ZenithOptimedia. In 2007, newspapers are expected to account for 28.5% of the ad spend globally.

• Paid search, the largest sector in online advertising, is forecast to  account for nearly $14 billion in global ad spending in 2007,  according ZenithOptimedia 
• Display advertising, including broadband video, is forecast to account for $10.5 billion in ad spend in 2007 
• Online classified ranks third with a forecast of $6.2 billion in 2007
• Other media, such as email and mobile, will account for $721 million in 2007

"It has taken only 11 years (for internet) to overtake two long-established media: cinema (which it overtook in 1997) and outdoor (which it overtook this year), and by 2009 it will be larger than radio," ZenithOptimedia's head of publications, Jonathan Barnard said.