Recently we have seen blog networks being taken down and everyone has their own opinion as to why. What we must remember is that Google has an index of the entire web and that is where they?re at benefit here, they can see the connection between sites (a link hub) which can be algorithmically tweaked to detect possible networks and go into a manual review status for Google staff to look into. If we take 10 sites and a network of 10 blogs, each of those 10 sites have now formed a connection together. But what really gets interesting is when 1000 sites form a connection between a network of 10 blogs that can form a red light for Google and make it easier for them to find the network. Obviously sites like twitter, facebook, ezinearticles, blogspot, wordpress, are going to be highly connected sites but it makes it easy for Google to allow exceptions. Google can automatically detect networks large or small by simply running an analysis tool onto a site and finding connecting sites. Now let?s say that you have 1000 unique domains that you would like to use in a network of 100 sites, there is no way of doing it without that network being detected. I think if people continue/start reporting possible blog networks to Google then the whole blog network game is going to come to an end. I do not have any proof to what I have said but I assure you that it?s easy for them to implement. I know there have been a lot of discussions on this but it would be interesting to hear your thoughts.