When major world crises erupt these days, a least some members of the media rush to check the blog of Renesys, a small New Hampshire-based firm specializing in what it calls "Internet intelligence." The insights found there into which dictator has kicked his country off the Internet for how long is a byproduct of Renesys's core work of selling information on the flow of Internet traffic to Internet service providers. But by monitoring the Internet's vital signs, the company can see how the ever-evolving global network of networks fits into global events.Doug Madory ...