Note Most of this information has been moved to http://readthedocs.org/docs/buildoutcoredev/en/latest/index.html and http://plone.org/community/develop. Please continue to update there where is makes sense.
Information for developers
Plone is developed by a group of various teams in addition to some key roles. For a description of all teams, please see http://plone.org/community/teams
These are all now updated at http://plone.org/community/processes/