Online advertising is a bright spot in a down economy, with growth of 20% reported in the U.S. for the second quarter of this year. Marketers are funneling more of these ad dollars into search, and for many, search means Google, which boasts about 70% of the U.S. search advertising market, estimated to reach $10.4 billion this year. The trend in search could have negative consequences for companies like AOL and Yahoo!, which have invested in display ads. Display ads are expected to bring in $5.2 billion in 2008 versus $4.5 billion last year.

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