If i was Sony right now, I would have one team working on the PS3 (That includes the protection for online, and the community.)
Sony will than hire another team within the Sony company. Since they already brought in IBM they are starting to make things interesting. IBM has been strong on computers providing lots of programs within windows. We all know that IBM is helping Sony, but can Sony protect/stop IBM from helping Microsoft too?
To be Honest, I think Sony is going the right way. Maybe Sony had learn their lesson from the recent attacks, who knows. There are also other reports saying that Sony is going to have google help, Using their software too. IF i mean IF both IBM and Google help Sony make PS4 we will have the amazing combination of Social online communication and have a whole new graphics for the NGC.

BJ:r