Hat tip to the SharePoint Solutions Blog for writing about another SharePoint hosted workflow that is included with MOSS.
The workflow is not activated by default and to be honest, I never knew it existed until reading their post the other day.
Anyway it is called the Three-State workflow and the description of how it works is located here.
This workflow can be a powerful tool for automating the tracking of the changing state of a SharePoint list item or document. Try it out.