D. J. Bernstein
Internet publication
djbdns
Advertising
Security
The dnscache program
The tinydns, walldns, and rbldns programs
The dns library
BIND, the Buggy Internet Name Daemon
Ease of use: BIND versus djbdns
It works for citysearch.com.
It works for pobox.com.
It works for one site that handles more than 300000 .com's
and .net's and .org's.
It'll work for you too.