A new white paper has recently been published here:
Windows SharePoint Services 3.0 includes a new wiki site template, providing a low-maintenance way to capture community knowledge. It can be used for brainstorming ideas, recording internal process information, or gathering data from the field. SharePoint wikis are quick to edit and make it easy for inexperienced authors to contribute. Built-in versioning controls enable you to easily rollback changes if people make mistakes.
This document provides answers to commonly asked questions and includes useful tips and tricks for using wikis in Windows SharePoint Services 3.0.