When looking round the Mambo site with the sample data, you may have seen the Write Comments link under some content items:
The Comments feature of Mambo is powered by a component, but there is also a mambot for displaying the comments.
The mambot is called MOS Comment and is enabled by default. We haven't talked much about managing mambots so far, but they are managed in a familiar way from the Mambots | Site Mambots administrator drop-down menu:
You can click the graphic in the Published column to enable or disable a mambot. In addition ...