Simply amazing! Google has been very impressive of late, introducing Wave, Google Voice, and Google Docs improvements. Now they have real-time search, which pushes updates as they happen around the web (from Twitter, Facebook, and other sites) into your search results.
Here's a sample search result for 'Google real time search' - watch for about 10 seconds and you'll see a steady stream of new results. Then post a Tweet while you're watching, and prepare to be amazed!