The next time you log in, if you haven't logged in already, you'll notice that your PSN avatar is being pulled into your profile and posts here on the forums.
If you're already logged in, I would log out and then log back in just to make sure it updates.
About time right?!
Please let us know here if you encounter any issues or anything funky happens with your account. IF you can't log in, shoot us an e-mail at web-helpnaughtydog.com