The lists can be integrated with existing firewall user databases or Lightweight Directory Access Protocol files.

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Once the user's location is known, existing demographic databases, which have been honed over the years to reveal what kinds of people live where, can be brought into play.

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Those who want privacy are fighting over Internet user identities, cookies, e-mail addresses, databases, and spam.

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Mahajan said that relying on databases and dedicated servers would have restricted the user growth rate, since these resources would have been overwhelmed.

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Finally, independent databases like MunicipalBonds.com aim to create a more user-friendly searching experience, though you may have to pay for some features.

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