PaulWebster is already working on a new FreeBSD wiki using XWiki
Types of contributors:
Team up developers and doc people early so that the doc committers can document it (for testers, early adopters). As the feature changes, the changes are also documented which is much less work bulding upon already existing documentation. Once the feature is stable enough to be released, there is already documentation available that can go in to the handbook. That way, a new FreeBSD release has a new feature and the accompanying documentation available.