I'm not sure why (it's probably just config related) but the bind9 I built with pkgsrc doesn't log in syslog.

logging {
        channel log-file {
                file "/var/log/named.log" versions 3 size 100k;
                severity info;
                print-category yes;                 
                print-severity yes;
                print-time yes;
        };
        category default { log-file; };
        category general { log-file; };
};