As the attack by a deranged gunman unfolded at Virginia Tech on Monday, one thing became increasingly clear: In many ways, and for a growing number of people, blogs and wikis -- and Facebook and MySpace -- are the new CNN. In the same way that reporters for the TV news network became a symbol of a new age, as they crouched on the rooftop of the Baghdad Hilton with their satellite phones while tracer bullets whizzed by, so live cellphone videos, blog postings and Wikipedia entries are becoming symbols of new media in 2007.

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