Joomla! DISQUS Comments integrates the DISQUS comments system & service into any Joomla! based website. DISQUS is a service and tool for web comments and discussions – currently the most popular comments-as-a-service provider worldwide. It makes commenting easier and more interactive, while connecting websites and commenters across a thriving discussion community.
In short, the most important features of the service are realtime comments, inline media embedding, mobile commenting, social integration with Twitter, Facebook & other services and great moderation & anti-spam tools.