Google Realtime Search has existed for months, now it appears Google flipped the switch to make Realtime Search a lot more useful, and have slipped Quora into Google Realtime Search, along with Gowalla, Google Buzz, Plixi, Me2day, Twitgoo, and possibly others -- enabling you to search through Quora activity and watch the results update in realtime, revealed a Quora thread.
Quora noted that Google Realtime Search is now indexing Quora activity such as asking Questions, adding Answers, upvoting Answers, and submitting Posts. At 2:13pm PST, the realtime search result for "Quora" spiked as Google started indexing activity on Quora.
You can try:
Google Realtime Search: google.com/realtime
Quora-only results: google.com/search?tbm=mbl&q=site%3Aquora.com
Quora-only results for "iPhone" search: google.com/search?tbm=mbl&q=site%3Aquora.com+iphone