Among the many recent LDAP related RFCs is:
4533 The Lightweight Directory Access Protocol (LDAP) Content
Synchronization Operation. K. Zeilenga, J.H. Choi. June 2006.
(Format: TXT=73895 bytes) (Status: EXPERIMENTAL)
I'm aware that OpenLDAP has included implementations of both client and
server sides of this protocol for a while now. I'm curious whether
there are any other implementations, in particular implementations that
might support content synchronization between an (Open)LDAP directory
and non-directory contexts such as Java- or Windows-based application
systems.