Bing and Facebook announced a major partnership Tuesday -- but it's not yet clear whether socially powered search results will prove a hit with marketers. People tend to "like" a relatively limited range of Web content based on what they think their friends might find interesting, so there's relatively little in the way of recommendation data for many kinds of mundane-but-useful items that people search for online. "There's still a big question: Will social search, a term that gets tossed around as if it's some kind of Holy Grail, actually be useful?" asks Jason Kincaid.
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