@Tom Semmens: Why not try OpenDNS.com? It's free and easy to setup. Just plug 208.67.222.222 and 208.67.220.220 into your DNS server settings. In additional to content filtering, you get phishing protection as well as setting up a blacklist for sites.

What's the ETA for the roll out to Remuera? I switch to Orcon in a heartbeat!