If you are in internal IBMer and need to configure your Portal 7.0.x to use IBM Bluepages for authentication, I've added a new page to my series on the use of Bluepages.
Check out "Configuring Portal 7.0.x to Bluepages" for the details.
For non-IBMers, this article explains how to connect to an LDAP that uses non-default LDAP attributes as your login attribute. For example, inside IBM, we use our e-mail address as our login ID for all internal systems.
How to Connect Portal 7 to the IBM Enterprise Directory, Bluepages