The following lists some possible roles:

• Admins / core users on all sites

  Basically the people on [pox].

• Wiki users on the main site

  Users which want to contribute to a Wiki-like division of the main site.

• Commenters on the main site

  Users which want to comment on some content in the main site.

• Journal readers on the journal site

  Readers of journal articles who want to comment articles or configure the site to their own personal needs - like fiddling with ranking reports.

• Editorial board on the journal site

  The editorial board managing the journal.

• Reviewers on the journal site

  The reviewers working on single journal articles.