Joomla general development

http://groups.google.com/group/joomla-dev-general

The list handles general topics about Joomla development, specifically targeting at our development community.

Joomla CMS development

http://groups.google.com/group/joomla-dev-cms

This list handles the development of the Joomla content management.

Joomla Framework development

http://groups.google.com/group/joomla-dev-framework

For discussing the core libraries - the Joomla Framework.