Tx for the suggestion! We plan to migrate where possible to rhel6, that has included the 2.4.x openldap (and the possibility of hot adding ram and cpu in VM env). We have already tested a multi-master conf. that works fine.
Using the OpenLDAP included with RHEL6 is a terrible idea. If you want to use OpenLDAP as a server, then build it yourself, or use packages from any of the numerous other sites that will build it out for you, so that you can stay current. Distro packages are in general only for using the client libraries.
--Quanah -- Quanah Gibson-Mount Sr. Member of Technical Staff Zimbra, Inc A Division of VMware, Inc. -------------------- Zimbra :: the leader in open source messaging and collaboration