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As Facebook begins rolling out its much-anticipated user interface, Timeline, now's the time to get to know what's so different about it -- and how to use it.

The Timeline interface, which will eventually replace the existing one for all personal Facebook profiles, is your Wall and Profile rolled into one with additional tools for documenting your life -- from the day you were born to the here and now. You can add a cover image at the top of your Timeline, add life events such as your high school graduation or your summer vacations, map places you've been, list pets you've owned, document relationships you started or ended and much more...