There are several ways to get help or information about ERP5.
The erp5-report mailing list keeps you informed about the latest developments related to ERP5 through automatically generated reports. Currently, this list is used to post cvs activities and the results of automatic unit testing.
The erp5-users mailing list is intended for users of ERP5 interested in sharing their experience. It is the right place to ask questions about installation, setup, features, configuration, etc.
The erp5-dev mailing list is intended for developers of ERP5. It is the right place to share technical information about ERP5's core architecture or to discuss new features added to the CVS branches.