Echo: real time engagement for your web site
Channel: Robert Scoble's Building 43
Date: 26/03/2012

Underneath ESPN and lots of other places is Echo, which powers their real-time interaction with their audiences. Khris Loux, CEO, talks to me about why Echo is being used by so many sites. Learn more at http://aboutecho.com/ 

These technologies "addict" users to these sites, because there's always something happening and changing on the site.