# inside a http section
# replace the several paths and names
server {
    listen   80;
    server_name  servername;

    access_log  /path/to/log/file;

    location /media {
        root   /path/to/sites/siteYY/;
        # I use a symbolic link called "admin" in the media/ folder
        # (pointing to /usr/local/lib/python2.6/dist-packages/django/contrib/admin/media/ in my case)
        # as suggested in http://docs.djangoproject.com/en/dev/howto/deployment/modpython/#serving-the-admin-files
        # so that nginx serves the django admin media files with the parameter
        # ADMIN_MEDIA_PREFIX set to '/media/admin/' in settings.py
    }

    location / {
        fastcgi_pass unix:RUNFILES_PATH/siteYY.socket;
        # for a TCP host/port:
        # fastcgi_pass   {hostname}:{port};

        # necessary parameter
        fastcgi_param PATH_INFO $fastcgi_script_name;

        # to deal with POST requests
        fastcgi_param REQUEST_METHOD $request_method;
        fastcgi_param CONTENT_TYPE $content_type;
        fastcgi_param CONTENT_LENGTH $content_length;

        # http://stackoverflow.com/questions/605173/how-to-nginx-virtual-servers-fcgi-for-django uses many other parameters,
        # some may be necessary in some situations
    }
}