Version 1.2 is available via the download page.  I added LDAP password authentication.  The user must exist in simple's local database whether the password is authenticated against the local directory or against the LDAP directory.  The user is also still able to log in with their local password in case the LDAP server goes down.

I'll work on getting a conversion from version 1.1 to version 1.2 created.  There are no changes to the database, just 2 files, but I'll need to write a tutorial on how to edit your settings file to enable LDAP authentication.