What happens when the PSN goes back up and they encourage everyone to go in and change their password. At this point, that data is already obtained by the hacking. What's to prevent them from going in and changing the information before you have a chance to?
Even if the people wich did this, do take a chance on doing this, after the security upgrades, it's pretty slim chance that it should be your account they did try with..
Afterall there is 77 million accounts wich might have been stolen, if worst case scenario is true, there still is safety in numbers.
I dont give a **** about their blog. They should contact their customers directly, not assuming that people follow their blog. They haven't exactly been keen on spreading this to the media either
Noone is going to contact 77 million people face-to-face directly, that's not realistic to expect.
Toyota didn't do that when they had floormats wich interferred with the braking system on their cars, they contacted their retailers, and media - said the car-model were recalled.
The only contact-information Sony has for you wich they are sure might be correct, is your e-mail address. You may or may not have filled in the correct address, when registering.. You did not fill in your phone number, or credit card information, with your account. So that may be false.
What Sony is doing is sending out e-mails, telling you what might have been stolen from them, and you should be carefull of what you give out, so noone gets the last remaining information.
Sony will not send you any e-mail's asking for your creditcard information, social security or similar, if that happens you are most likely beeing targetted for identity theft.
So I think it's unlikely that there is any kind of e-mail activation.
The safest thing is just to wait and see what happens when you turn on your PS3/PSP with the updated firmwares.
As well as looking at your bank-account.