Online advertising accounts for more than 10% of all ad spend in 7 European markets

"Online advertising accounted for at least 10 percent of overall advertising spending in Denmark, Germany, the Netherlands, Norway, Poland, Sweden and the UK, the report said.
Norwegian Internet users were the most expensive to target, with advertisers spending 133.20 euros per consumer reached, compared with the European average of 80.60 euros. In the United States, the average was 91.90 euros per person.
The sectors investing most in online advertising were entertainment and leisure, telecoms, and finance and insurance."
Source: Reuters, 2nd June 2008, citing data from the IAB/PWC