Finally got it loaded with sample LDIF and working on my W2K. In addtion, a JNDI client for simple bind, searching with Jython and ldapsearch is also working.
LDAP protocol is very popular these days. lots of large size projects are using it for user authentication and infos.
In my project, for the performance reason we use it for authentication and all the rest is done via a Web Service SOAP over HTTPS API.
I 've measured performance on LDAP over SSL. There are two types of LDAP connections: 1 persistent connection (looking for uid), the other is LDAP bind for user authentication. Reusing the first lookup connection is a good idea.