Real-time encyclopedias can be very useful for students in order to develop research skills. I would like to show two examples:
Mashpedia http://mashpedia.com/ is a dynamic encyclopedia, that pulls content from different online services in real-time, offering a complete and fresh outlook about (almost) any topic.
Every time you query Mashpedia, it loads information and digital contents from many online sources and then organize them in an easy-to-use interface. At Mashpedia you can find fresh data and digital media from newspapers, magazines, blogs, books, Wikipedia, Youtube, Twitter, Facebook, Flickr, Social Answers and more online resources. (Source http://mashpedia.com/about.php)
Zomobo http://zomobo.com/ is a new site that bills itself as a real-time encyclopedia. Zomobo, pulls the latest information available about specific topics that you're interested in. When you look up a topic in Zomobo you will get information pulled from blogs, social networks, Flickr, YouTube, newspapers, news sites, and Wikipedia. (Source http://www.freetech4teachers.com/2011/07/zomobo-real-time-encyclopedia.html)