But when it comes to our minds, Nicholas Carr argues that our obsession with connection has a cost.

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The Internet, Carr argues in his new book The Shallows: What The Internet Is Doing To Our Brains, is a distraction factory.

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In fact, argues Nicholas Carr, the former editor of the Harvard Business Review and author of the new book The Big Switch, those Web applications are signs of a fundamental change, a shift from the desktop to the Web that could redefine computing--and Google's business model.

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Carr, who spent five years studying bank robberies and interviewing crooks, argues that a warm greeting to a would-be robber eliminates psychological "trigger points"--confidence, anonymity, control over his fear--that the robber needs to go ahead with the crime.

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