The integration involves Bing showing top Quora contributors in the sidebar when there’s Q&A content on Quora that’s related to the Bing search term, much like the sidebar might show content from Facebook or Twitter if that’s relative to the search.
Here’s a screenshot of integration that’s being shown on both Bing’s and Quora’s announcement:
Quora isn’t a new partner for Bing; it was included in the partner list when Bing originally announced the social sidebar back in May. Today’s announcement is that the integration is finally complete and available to all Bing users in the U.S. — much like it announced the Foursquare integration in July. (Foursquare was also listed as one of the original partners in May.)
For Quora, the Bing partnership gives it more exposure. Quora’s been pushing in that direction lately. Just yesterday, it announced the availability of embeddable Q&A content widgets for web site owners.