If it ever was just your space...
As people make social-networking sites a bigger part of their lives—swapping weekend updates with friends or creating business profiles—they're leaving behind a vast trail of personal data. A crop of new companies has sprung up to pull that information together—and make a buck from it.
Around 30 startups, with such fanciful names as Rapleaf, Spock, and Wink, are building services that specialize in tracking people and their reputations, and sites where people can edit their social-network profiles from one hub. As they fan out, these companies are raising questions about what privacy means now that every experience or memory is fodder for sharing online.
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