Bing integrated the twitter results into its search results first. And now according to Google, realtime search is now live (Whoa, they did it too)….
Google gets information from twitter, from more than a dozen new search technologies that enable us to monitor more than a billion documents and process hundreds of millions

A brand new Twitter homepage. It’s new, it’s very blue, and it’s all about search. In fact, from the looks of it Twitter has decided to take the simple and straightforward front page route, centered around search. Gone are any attempts to explain Twitter, or a link to the Twitter in Plain in English

BingTweets combines Twitter trends with Bing search results, enabling you to see deeper, real-time information about the hottest topics on Twitter. You can also search for anything in the BingTweets search box (at the top right of every page) and see Bing search results alongside the most recent related tweets.
In partnership with Federated

Facebook to roll out its new search results that will continue to include people’s profiles, Facebook Pages, groups and applications, and some entirely new Search features. With the test, you will be able to search your News Feed for the most recent status updates, photos, links, videos and notes being shared