Im sure that some of you may have heard of OpenDNS but perhaps like me, you were just using them for their DNS service.
(OpenDNS provides name servers that contain an index of sorts for sites on the internet so that your computer can find them when you try to access them - at least thats the over simplified version)
I found out though that if you go and register with them for free, you gain access to a whole load of other options, reporting for example, content filtering (you can filter by categories, e.g. Pornorgraphy, Nudity, Religion and so on) or by domain. I think its great for anyone with kids who wants a bit more control over what they are up to online.
As you are making these changes on the OpenDNS server, its quite easy to keep track of things and slightly more difficult (though not impossible) for someone to circumvent. It helps of course if you configure the DNS addresses on your home router and then distribute the IP address to the other computers via DHCP or static DHCP.
Anyways, take a look perhaps some of you will find it useful(?)