Hi,
This seems to be quite new still as the site's copyright is 2008. Reading the FAQs,it currently only works with region 1 DVDs and also needs a particular type of DVD machine. It seems you need to download a program (or filter) for each DVD you will be watching and this will either blank the audio for bad words or skip forward for graphic scenes. You will also need a subscription to use this thing too -(someones got to sit through all possible films and edit the content ) Don't the BBFC already do this ?
Personally I think this seems a lot of hassle to allow kids to watch 'unsuitable' dvds for their age.
Anyway good luck to you.