The TiddlyWiki discussion groups are mailing lists for talking about TiddlyWiki: requests for help, announcements of new releases and plugins, debating new features, or just sharing experiences. You can participate via the associated website, or subscribe via email.
Note that you do not need a Google Account to join the discussion groups. Subscribe by sending an email to mailto:email@example.com.
There are several resources for developers to learn more about TiddlyWiki and to discuss and contribute to its development.