A lot has been written about social news and how Twitter and Facebook are in the running for defining and dominating it. There's also a lot of hand-wringing about how journalism will be disrupted by social. I might be a bit biased as a former employee, but when it comes to social news, I think LinkedIn could become the Wall Street Journal of social news—not Twitter or Facebook. In fact, LinkedIn is expected to announce a new social news product this week. In what may or may not be a precursor to that anticipated product, a few days ago I received a curious email from "LinkedIn Headlines" (the actual email address news@linkedin.com). It was an email digest of the most shared news in my network about the Internet industry (see screenshot below). There has been no official launch of a product by that name nor have I seen anyone else write about it. But that email made me think a little more about the different types of news I consume.