Though the internet group collectively known as Anonymous has expressed their intent to attack Sony's networks before, they are now claiming they are not behind the infiltration that caused Sony to take down PSN for the past few days.
I was under the impression that it was no coincidence that PSN's networks were down, considering Anonymous' recent threats and the whole George Hotz situation. Since Anonymous is seemingly more of a collective hive mind than any true organized effort it is still possible that someoneinvolved with Anonymous on 4chan took it upon themselves to attack the network. Sony is currently investigating the situation.
I was under the impression that it was no coincidence that PSN's networks were down, considering Anonymous' recent threats and the whole George Hotz situation. Since Anonymous is seemingly more of a collective hive mind than any true organized effort it is still possible that someoneinvolved with Anonymous on 4chan took it upon themselves to attack the network. Sony is currently investigating the situation.