|Project:||Lightweight Directory Access Protocol (LDAP)|
The project page says that this is intended to replace the existing http://drupal.org/project/ldap_integration module. However, modules routinely have major overhauls between major versions so why aren't you collaborating with the developers there?
It also looks like the same people are also working on this module: http://drupal.org/project/ldap_api
How exactly do all of these differ?