PC World - April 24, 2008

Excerpt from PC World:

While many other companies are already supporting mobile banner ads, mobile Internet usage is still relatively low, so Google probably hasn't missed an opportunity, said Greg Sterling, an analyst following mobile search and advertising as part of a joint venture between Sterling Market Research and Opus Research. "It's not like consumer behavior is established and they're late to the game," he said.

In addition, advertisers are still mostly experimenting with mobile advertising, so few are wedded to any particular ad network, he said.

From the article, "Google Launches Mobile Banner Ads", PC World, April 24, 2008