To be safe, many move ID thresholds up to 30 or 40.

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But more than 10, 000 Web sites now recognize a service called Facebook Connect, which enables users to use their Facebook ID and password to move fluidly among sites where registration is required.

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If you had a MobileMe account that you did not move to iCloud, you can use that Apple ID to sign up for a new iCloud account (none of your previous MobileMe data will be present).

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