Facebook is currently testing out a new feature that pretty much has the same functionality as Twitter’s retweet option. B asically when you find something cool that your friend posted under his profile, you can share it with your circle of friends by ‘reposting it’ using the share button. But previously it never gave credit to the original poster, but with facebook’s recent implementation, all shares now show a “via @username” (where the username is the name of the original poster). Isn’t that roughly how the twitter “re-tweet” works?
It seems like this new feature is live for everyone. To try it, just go to a friend’s posted item in your news feed and then click “share,” and you’ll see a “via [your friend’s name]” (with an option to remove it of course). Once shared, the item will appear on your profile, with a via link that points to your friend’s profile as well. Your friends will also see the item in their own News Feeds, thus spreading it even more (just like Twitter’s retweet).
From what I can tell so far this feature only works for posted items/links – you can’t “via” someone else’s status update or photo (as yet). So next time you see something shared on facebook, you are likely know its source.