It wasn't actually a locked door, cause i'm sure the hackers cloned the jig module h/w and used it with their sw, so ps3 recognize the usb key like the sony hw itself, it's looks like a troian horse more than a firmware hack.
The problem until now was that no one shared the jig scheme, that's why no one was able to use this "simply" method. Maybe these hackers have really GOOD contacts
