On a related note, here are the four basic features I think any categorization package should provide to OpenACS:
UI to manage categories. This is fully implemented in the current package.
Documented code snippet to add to any OpenACS object's UI to associate the object with categories. (This is analagous to putting an "add/view comments" blurb, as documented in General_comments in Advanced Tutorial). As far as I know, this is not done.
Documented code snippet to display category info per object. Also analagous to comments. Also not done, AFAIK.
By adding a flag to list-builder, automatically filter objects by category. Not implemented.
