Metaphors abound in descriptions of social media sites today. They are "exploding," the "next big thing," the "new media revolution." Here's another that will be familiar to anybody who watches football: They're the center of a big pileup.
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Everybody -- including job seekers, recruiters, marketers -- is jumping on them, trying to get a piece of the action in the midst of a chaotic jumble. Sometimes you scoop up a new job lead or connect to a promising candidate. Or you come up empty-handed and a little bruised.
Some recent bits of data to consider: