Migrating Wiki Pages from Mac OS X server 10.5 to 10.6
Here are the steps to manually migrate a wiki from 10.5 to 10.6:
sudo serveradmin stop teams
sudo mv $GROUP_DIRECTORY /Library/Collaboration/Groups/
sudo chown -R 94:94 /Library/Collaboration/Groups/$GROUP_DIRECTORY
sudo rm /Library/Collaboration/dataVersion.plist
sudo rm /Library/Collaboration/globalIndex.db
sudo rm /Library/Application Support/Apple/WikiServer/directoryIndex.db
sudo serveradmin start teams
You will then need to navigate to the wiki as an administrator and set the access permissions in the wiki's settings screen. There you can restrict access by directory users and/or groups (if you need that level of granularity).
Tip copied from Apple Discussion Forum.