Sony's share price in Tokyo is down about 200 points since the start of the shutdown, from around 2,500 yen, to 2,300, having bounced back 2% today, but was down by 10% at its worst. This news could see the price fall further still as the negative press it will generate will have some impact.
Sony Europe updated its blog over the weekend, saying that the company is still testing and working towards resumption of service:
As you’ve heard us say, our utmost priorities are the security of the network and ensuring your data is safe. We won’t restore the services until we can test the system’s strength in these respects.
So, basically, its not over by a long shot!