DNS from a MySQL DB
I've done a lot of DNS in my time. Experience has taught me to be very wary of BIND with MySQL extensions. In fact experience has taught me that it's a really bad idea. So, using my Perl skills I worked out an alternative.
It's very simple. With a simple schema all the zonedata can be thrown into in MySQL. Then a Perl script run from cron generates the zonefiles and configuration, and uses ndc (or rndc) to control the daemon. The rest is standard BIND.