I'm needing to allow users of a site to add structured comments to nodes. Are there any stable modules out there for Drupal 6 that will enable me to do this? I'm thinking along the lines of being able to add CCK-like fields to the comment type. In an ideal situation the administrator would be able to alter/change the questions being asked on a node-by-node basis, but not necessary. We're after a simple solution if possible.
You might want to check the Node comments module. It allows you to use nodes as comments, which makes it possible to use CCK fields in them.
The currently maintained 2.0 version is still in beta, though.