NSD (http://www.nlnetlabs.nl/nsd/) works with BIND's zonefiles and has a very small memory footprint and usage. So, a great app for VPSs...can DA use this for it's VPS edition ?
include "/etc/named/manual.named.conf";
include "/etc/named/proxydomains.named.conf";
include "/etc/named/reverse.named.conf";