A representative for Bing tells WebProNews, "It was developed to help consumers identify the most influential people to watch on Twitter, based on their specific interests. It is currently available within Bing Social, appearing in the right-hand panel of your screen."

It gives recommended Twitterers with labels like "influential" or "popular". The biggest problem I see with it is that it only lists three, and I don’t see any options to see more. If I’m really interested in a topic, it would be nice to find more than three people to follow. Luckily, there’s always Twellow (shameless plug). 

"People Recommendation works by recommending new people to follow on Twitter both based on their influence as well as their popularity, as related to the content of your query. For example, search Bing Social for a new movie and actors from the film will appear in the recommendation column with direct links to their Twitter page," says the representative.
 

The feature should be somewhat useful for the casual Bing user, who actually goes to the Bing Social site, as the feature doesn’t appear to be integrated with regular Bing search, at least at this point. 

Twitter has been doing a lot lately to increase user discoverability. The company probably appreciates this Bing feature.

After a few questions, the Bing rep tells us, "I don’t have anything else to share about future social features/functions (deals with networks like FB, results appearing in main search results page, etc), but there will be more to come in the social arena as this latest feature is a continuation of Microsoft’s goal to develop solutions to use real-time content to augment traditional web search technology."