I have been using this service for awhile now and I just thought I would formally recommend it. OpenDNS is usually a faster alternative to the default DNS provided by your ISP. It protects against phising automatically and can be adjusted to automatically block adult material aka porn. AND you can travel with your settings by creating an account.
I use a Macbook that I purchased last year. It has OS X 10.4.5, or Tiger, installed. It’s a pretty good machine. So I decided to upgrade to 10.5.4, or Leopard. Yea, it has been about a year and yea, 10.6 is coming next year, but that’s beside the point.