OpenDNS is a great tool for free (kinda’), community managed web content filtration. We see this used more in education customers than corporate customers, but essentially you point your DNS at them (or your DNS servers as the case may be) and they filter out different kinds of content. As is often the case with free apps, you’re not going to get all the features you might get with some other applications, but OpenDNS is a great start, especially if you’re not currently doing any kind of filtering. To integrate it is very straight forward: sign up for a free account and define the address for your network in their…