Nodes of any type can now be categories
The categoryi module now supports the ability to allow nodes of any type to be categories or containers. This is a major new feature, and one that many users have been waiting for. One user in particular - who goes by the name of kiteatlas on drupal.org - wanted this feature so badly that he paid me to speed up its development. That's right: this is the category module's first sponsored enhancement!
This feature is a very important step for the category module, as it brings it in line with the "user-defined node types, module-defined node extensions" model that was pioneered by the Drupal event module, and that is becoming the preferred standard for Drupal modules. For example, the organic groups module was also recently enhanced to support this model. The biggest advantage of this approach is that the user can now mix any node types in with the category system - including CCK node types. Since category now supports both Views and CCK, that makes it fully Drupal 4.7 buzzword-compliant!
Documentation for using this new feature will be available in the docs section of this site soon. In the meantime, the issue thread for this feature (link above) provides a list of the new features, which is detailed enough to serve as user documentation for now.