CIO.com: 5 Real-Time Options to Google and Bing
“When search engine giants Microsoft Bing and Google announced their moves into the real-time search arena late last year, they joined a number of small startups racing to position themselves ahead of their competitors. Unlike traditional search engines, real-time search sites index updates from social communities such as Twitter, Delicious, Flickr and YouTube, providing you with a peek into the hot discussion topics on the Web.
Many people have turned to real-time search sites to follow events (think Captain Sully landing on the Hudson River or the aftermath of the earthquake in Haiti)-these results can often point you to blogs and other new sources of information that traditional search engines may have overlooked. “It essentially allows you to tap material…where there is almost no delay between composition and publishing,” says Michael Fleischner, author of SEO Made Simple.”