title: Pros and cons of commenting systems and APIs (Disqus vs Facebook Comments vs Intense Debate vs Echo)?
body: <p>With the release of the new Facebook commenting module, could people please share their experiences with the various commenting systems -- specifically, Disqus, Echo, Intense Debate, and Facebook Comments?</p>
  
  <p>What are the pros and cons of each system?</p>
  
  <p>Thanks!</p>