The Economist (April 2d, 2005) has a great piece about the prevalence of mobile phones in South Korea. Three out of four people in the country carry a mobile — and that ubiquity is overturning even recently established social conventions. For example, “many young South Koreans . . . do not think e-mail is particularly cool,” the article says. “They prefer to send text messages, which are more immediate and certain to be delivered immediately. South Koreans in their teens and 20s increasingly look on e-mail as an old and formal means of communications, according to one study. ‘You would exchange e-mails with your bosses, but not your friends,’ says a young South Korean marketing assistant.”