We have had to take the SOE service down temporarily. In the course of our investigation into the intrusion into our systems we have discovered an issue that warrants enough concern for us to take the service down effective immediately. We will provide an update later today (Monday).
Now to clarify - SOE is known for titles such as EverQuest, FreeRealms, DC Universe Online, not the PlayStation brand.
Sony has told Kotaku:
... that this was not a separate attack, and that service going down was "related to the ongoing investigation of the external intrusion that occurred in April."
(ie- It's the same attack as the one that caused the ongoing PSN outage)
Only around 12,700 credit cards were at risk this time...