Along those lines, she said that Google is working on a new search feature to let users view content in their Google search results that their friends have shared with them on social networks.
"We can use social networks and analyze them to improve search quality. When you're signed in and have a Google Profile established, we'll look at the different social networks you associate with, understand who your friends and connections are, and surface content written by them on your results pages," Mayer said.
The Twitter search-result integration and the new social-networking results feature will be implemented "very soon," Mayer said, declining to be more specific. Google's announcement of the Twitter agreement states it will be ready "in the coming months."
Still, it seems Bing is for now ahead of Google with an optimized search experience for Twitter that is already live.
Although Google remains by far the most popular search engine, Microsoft is making a big push to improve its position in this market, starting with Bing's launch in May and the broad search deal with Yahoo, which is awaiting regulatory approval.
In addition to its core microblogging and social-networking features, Twitter has emerged as a repository of real-time testimonies on whatever is on people's minds, such as news stories of global importance, celebrity gossip and hot-button issues. As such, being able to capture, analyze and make sense of Twitter's stream of posts is seen as an important new area in the world of search engines.
"We're super happy with the Twitter partnership," said Qi Lu, president of Microsoft's Online Services Division, who was also on stage being interviewed by conference moderator Tim O'Reilly. Lu declined to disclose financial details of the deal. He also said he wasn't sure on its duration.
Neither Mehdi nor Lu said much about the Facebook arrangement, other than to indicate that it will be similar in nature to Twitter's but that it will be implemented at a later date.
It will be interesting to see what shape the Facebook agreement takes, considering that Facebook allows individual members to make only basic profile information available via search engine results. Facebook has indicated it may let members make their profiles open to anyone on the Web, including their status updates, but that hasn't happened yet.
Twitter, on the other hand, is a much more open service and most of its users make public their "tweets," messages that can't be longer than 140 characters.
Facebook expects its deal with Bing to become active early next year, a Facebook spokeswoman said via e-mail. Before Bing can make Facebook status updates searchable, Facebook has to first roll out to all users its new Publisher Privacy Control system, which is now being tested with a small group of users, the spokeswoman said.
"As you may recall, the new Publisher Privacy Control enables users to define who can see the content they publish on a per-post basis. For example, they may want to make some posts available to everyone, while restricting others to their friends and family," she said.
Microsoft and Facebook have an existing partnership through which Microsoft provides Web search and search ads to Facebook.
This story was last updated on October 22, 2009