When an article is written, various comments from other people may hold great deal of information regarding the topic. That's why it's very important to open discussion on web pages. In our company we mainly use WordPress, so I'll explain how to properly set up comments on WordPress. Our publishing platform Foliopress is based on WordPress version 2.2.3, so screenshots and settings will apply mainly to these versions, but other versions are surely, not so different.
First order of business is allowing discussion in wordpress. Settings for this are in Administration back-end in Options->Discussion. For our company these settings are preferred:
Information on these settings (from WordPress developers) are here.