reading stuff about dns poisioning and attacks
about attacks against dns infrastructure and procedures http://www.sdl.sri.com/other/dnssec/DNSSEC-JPWorkshop-pre...
- about dns http://www.bovine.net/~jlawson/hmc/dns/
The alternative and security initiative http://www.sdl.sri.com/other/dnssec/
that you find here http://www.dnssec-deployment.org/ and here http://www.dnssec.net/
and about the newest bind http://www.bind9.net/