The PSN is down for several hours, during this time myPSN will report an error. It will be up and running again later tonight/early tomorrow.
UPDATE: All backup and running fine 
myPSN version 2.1 has been approved by Apple and should be available on the app store in a couple of hours.
I’m not sure why myKILLZONE hasn’t been approved (despite being submitted first!) but hopefully it won’t be long behind…
Let me know what you think of the update guys!
Some people are having trouble signing in to myPSN for the first time, hopefully this short set of instructions will fix it for you. If you’ve done this and are still having problems please feel free to contact me, either through the form at the bottom of this page or through the comments.
1. Go to http://uk.playstation.com in your browser and sign in with your PSN details, please note that it must be this URL and it doesn’t matter if your account is from a different region – it will still work.
2. You will probably be presented with a screen that looks like this…
…and your instinct will be to try and put your email address and password in the box but there is no need to unless you have an extremely old EU Playstation forum account (it may even predate the PSN!). All you need to do is look at the next section down, titled “No, I will fill out the information myself” which is incredibly misleading – there’s no information to fill out! Just click submit in this section.
3. You’re done! Load up myPSN on your iPhone and it should work, if not then send an email my way
Just a small update this time
Changes:
Now available on the app store! Let me know why you think of it
Could you guys who are having issues with signing in let me know if it has fixed it?
Its been very hard for me to diagnose as I can’t reproduce this problem in my country, just hoping that I got it!
P.S. when you get this update I highly recommend your first sign in is over wifi