As it was mentioned in the previous blog post @drupal.org logins are valid no more. Again, feel free to contact us to transfer your older posts to your new account (you have to create new account first).
We are currently testing facebook logins and twitter logins are coming up. Stay tuned! And let us know if there are any troubles.
Anyway, as usual, creating you very own account at drupalsites.net is the most preferable way to keep yourself out of "I lost control" situation.
We also disabled OpenID login option as just one(!) user would use it at all.