Identify a Web 2.0 technology

Identify a Web 2.0   blinkx.                                                                                                                         Describe what it is:  It's a site for video blog with the addition of images, text and audio.  It's search engine that helps you find a certain Vlog in the ever increasing number of vlogs.                                   How is it useful: It can be useful for research of a certain topic for schools science and universities as well as business.                                 2 advantages:  a.. Instead of looking for a certain vlog through Google or Bing, onecould go stright to blinx. com faster. b.  It's an excellent site to start a vlog.  This would open a conversation with other vlogers    2 disadvantages:  a. This could open the door to unappropriate speech and ideas.  2.  It could be taken out of context.