I’m on Twitter all day long, and Facebook nearly as often–not just because they’re fun, but because they’re useful research tools. LinkedIn? I find it handy when I want to look up vital facts about a particular person, but I don’t spend that much time there otherwise.

Here at the TechCrunch Disrupt conference, however, LinkedIn unveiled Signal, a set of still-in-beta tools for searching, filtering, and otherwise wrangling all the stuff that goes on among your LinkedIn contacts. They haven’t shown up in my account yet, but look interesting…

 
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