I've made a small howto for mercurial working as centralized server via HTTPS + read/write access and nginx web server. This all is made under FreeBSD. I would ask for suggestions and reviews from the mercurial community :-). Please add it to the mercurial home pages if it;s worth it. link : http://wiki.bsdtrap.org/index.php?title=Mercurial_Centralized_HOWTO