Google Real Time Search
Real time results are finally integrated in Google Search thanks to live content updates originated from Twitter, Google News, Google Blog Search, FriendFeed, Jaiku, Identi.ca and newly indexed web pages.
Not every search will feature real time results, but searches about popular topics (like Twitter Trending Topics and those on Google Trends) will show a stream of real-time content from blogs and social networks somewhere in the SERP.
In the image below, a real time content stream is shown under a Latest results heading, right after News results. Clicking on Pause/Resume and using the scrollbar help browsing the results.
If you click on Latest results you go to a Google Search page with the Latest option selected that will continuously update itself with new results.

Check Google’s YouTube video about Real Time Search (really nice music!)
