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"Facebook has added a small but useful feature that makes Posted Items a bit more interesting.  Now, when you click on a friend\u2019s Posted Item, you\u2019ll get a Facebook navigation bar \u201Clayered on top of the page you arrive on,\u201D (in a new tab) as you can see in the example below.\nThe value here is that opposed to navigating back and forth between the new tab and Facebook, you can view comments, add new ones, and share the item yourself, all from one convenient navbar that hovers over the posted item.  This should increase engagement around posted items, as well as give them a bit of a viral boost as users \u201Cre-share\u201D items that their friends have posted.  \n\n\n\n\nPosted Items already became a bit more prominent on Facebook when they got their own tab on the homepage with the social network\u2019s major redesign earlier this year.  Some pure speculation: now that Facebook is further encouraging users to engage with Posted Items, could an aggregate view of the site\u2019s most shared items (ala Digg) be in the works?   It could be tricky given the privacy settings around user comments, but would certainly be feasible as the company expands its media strategy.\nLike most Facebook rollouts, the navbar is being released to everyone over time, so you might not see it in your account just yet."^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2008/12/17/facebook-posted-items/>