As more viewers - especially young ones - shift from television to the Internet, advertisers are following.
Ad revenue is expected to grow to $26 billion in 2010, from $12 billion in 2004,
Yahoo, MSN and AOL all average more than 100 million users a month;
Google gets about 75 million ...
(c) comScore Media Metrix.
The broadcast TV networks still dwarf the Internet,
with 43.4 million viewers daily
(c) Nielsen Media Research.