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Credit: XPLANE

Ninety percent of teens with Internet access have tried social networking technology. They average about nine hours per week doing so and -- great news, teachers -- about half say they've talked about schoolwork while online.

Another upside: Seventy percent of the new jobs created in the United States between 1998 and 2004 are interaction intensive, meaning they require collaborative judgment and insight. Wages for these jobs -- including those in the insurance, banking, and health care professions -- have risen faster than the economy as a whole, suggesting that those prepared for an interactive-oriented job market will have a competitive advantage.

Source: U.S. Bureau of Labor Statistics, Cisco Systems research