I managed to get latest netatalk to compile and install on my amd64 Ubuntu 14.04 vm, so I don't need the nfs user stuff resolved (remains to be seen if it will install to ppc metal version).
Now I gotta new question, which (I hope) may be a generic unix -y question rather than specific to afp:
Is there a way to force files written to a particular share to have a different group (which the user is a member of), e.g. 'joe/www-data', rather than the user's default group (e.g. 'joe/joe') ?
edit: chmod 2775
(taboo) EDITED: 4 Jul 2016 14:16 by DSMITHHFX