If you go to http://www.theblackinkproject.com/login.php you have to enter login information in order you to excess the site. To register you have to put your name and email. Then you have to activate the registration with clicking the link at the email they will sent you. I know that the email part is using autoresponder but how do you integrate it into a secure member page at our website?
It's fairly easy to do, use the email address as your username, generate a hash for both password and activation code, send to the registered email address and when they confirm by clicking the link, activate the account.