Qmail, LDAP and public Email Address lists

[Dennis]

Hi all...

I have, possibly, a simple question.
In about 2 days, I'm going to setup LDAP for directory services for our org.
A question that has just sprung to mind is public address books and LDAP!!
I'd like to allow any of our users to add and remove "public" address book
entries.
There is going to be a secure, private, address book list also.

Is this possible ?
Is there a web interface for LDAP that allows this ?

Cheers
Dennis