Fans of OpenDNS — everyone at CG uses it, I know that much — will now be able to block pornographic sites with the click of a button. The service uses St. Bernard’s iGuard, a service that apparently scours the web for PR()N so you don’t have to. While this might rankle some folks at work, it could be a great way to make sure junior stops with the underpants party at inopportune times or a quick and easy fix for libraries and schools who essentially have to take a zero-tolerance approach to all this. Me? I’m leaving everything on.