Internet ad revenue moved up 21 points in 2003 to a cool $7.3 billion according to the IAB.

Keyword search led the charge accounting for more than 1/3 of revenues. Other ad types included:

– Classified ad revenue – 17%
– Rich media – 8%
– Display advertising – 21%

Who did all the spending?

– Brand advertisers – 37% (Retail 41%)
– Computer industry – 20%
– Financial services – 12%

Read more at AdWeek