Just want to let you know, i achieved per-user LDAP address book with OpenLDAP backend moment ago, Roundcube users can now store their personal contacts in OpenLDAP instead of MySQL.

If you want to achieve it now, here's detail steps:
http://www.iredmail.org/wiki/index.php? … dress_Book

Feedback, suggestions, patches are always welcome.

Commit log:
http://code.google.com/p/iredmail/sourc … e42606cc80