Google fails to make inroads in South Korea from the Associated Press is a interesting look at how there's at least one country where Google is not tops or a major player: South Korea. Instead, the human-based Naver service remains far-and-away the most popular.
It's the one exception I know of where a question-answering model has succeeded and thrived, compared to those run by Google and Yahoo. The relatively small slice of the web in Korean, along with apparently poor automated search technology initially, has allowed Naver to succeed.
The story touches on Google's efforts in the country, including the promotional Google Bus that was sent around. You'll find more about Naver from us here: An Internet Search Company Hotter than Google? A Profile of Korea's NHN and Naver.com