I posted this to Twitter already, but it seemed worth re-posting here. This article is a good explanation of what OpenDNS is and how it can be used to reduce the risk of phishing (i.e. fraudsters luring you to a fake site that looks like a real one in order to harvest personal info).
I installed Open DNS to our Airport this morning, and I must say it is MUCH faster than the DNS servers offered by our ISP as well.