Here is the official notice to newsletter/email subscribers:
"1.Access the following URL.
* The page will become accessible starting at 19:00 on Aug. 31, 2010.
2.Log in with your Square Enix account and have a registration code issued.
* Depending on the access status, we may temporarily suspend the issuance of registration code. If you cannot have registration code issued, we ask that you please wait a little while before trying again.