We've been trying to get our heads round the whole parties/groups/persons structure too. There may be an error in the initial primary membership relationship type that is created. From the dev notes it seems that the membership rel should allow a group to be a member of another group but the master membership rel created in acs-kernel/sql/postgresql/groups-create.sql makes object type two a 'person'. Should this not be 'party' so that both persons and groups can be members of groups?
