To create a WikiNewsletter:

• Choose a TopicName for the name of your WikiNewsletter; by convention these names usually end with Newsletter (e.g., MetaWikiNewsletter)
• Create a topic page for your newsletter
• Add a property called Description that says what your newsletter is about
• Add a property called Topics with a comma-separated list of topics
• Add a property called Subscribers with a comma-separated list of subscriber email addresses
• Edit the WikiNewsletterIndex (see instructions below) topic and add the name of your newsletter to the Newsletters property

Editing your WikiNewsletterIndex

Each TopicNamespace has its own WikiNewsletterIndex. When you edit yours, you need to be sure you are this for your the namespace. For example, there's one here (WikiNewsletterIndex) that probably isn't where you want to put your newsletter -- unless it's about FlexWiki.

To edit your newsletter index, go back to the HomePage of your namespace and edit the WikiNewsletterIndex there!