Email alerts about status updates and notifications often contain a link that lets a user of the social network respond quickly by clicking it to log in in to their account.

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Slide your finger to the left and you're dropped into the event view, which shows the date, current weather, a list of notifications and status updates from social networks.

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From the Me Tile people can check in to their location, post an update, set chat status, see what's new and monitor notifications across Facebook, LinkedIn and Twitter.

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Your Facebook notifications work with Notification Center in Mountain Lion, and you can even update your Facebook status from within Notification Center.

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