Research firm eMarketer predicts that this year's online ad spending will drop from 2008 figures -- the first year-over-year drop since 2002. Their report pegs U.S. expenditures at $22.8 billion for the year -- a drop of 2.9%. Search is up, and banner ad spending is flat, while sponsorships, classifieds and e-mail marketing are all down, per eMarketer.

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