There are two possible side effects to Facebook's decision to let just anyone traipse through its student-union grounds. Since Facebook is easily one of the largest repositories of personal information, it creates a one-stop shop for such data. This means, hopefully, that people-search startups like Spock and the rest will be kicked to the curb, as users pass them up for Facebook's superior interface. Or, in another scenario, Facebook's move could be adding fuel to the fire. Next thing we know, Spock will be rolling our Facebook networks, complete with information about our school, work, and personal interests, into its profiles. And unlike Facebook, there's no control over what gets added to your Spock profile.

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