According to feature #313142 ("YaST support only SSSD for LDAP based authentication") we want to remove current nss_ldap/pam_ldap support from YaST modules and leave only support for SSSD. Target is next openSUSE realease (12.2).
SSSD is there already now (12.1), but still only as an option. With new approach, we should of course provide a migration from current setups.
However, this also means that we will stop supporting non-encrypted connections to LDAP server, because SSL/TLS is a requirement for SSSD. So you have to prepare your LDAP servers so they are able to provide TLS.