in reply to Using LDAP through PERL

  1. Net::LDAP every thing you need to build robust ldap apps
  2. Not that I'm aware of, but openldap is, for LDAP, quite easy to set up and following the quick start guide on their site will give you an environment to play with.
  3. The O'Reilly LDAP System administration contains a very full explanation of LDAP admin with Perl as well as covering all the concepts you are new to.