Address Book Importer allows you to easily import contact information from LDIF files into your 10.1 Address Book.
Address Book Importer is a utility you can use to import email addresses into your Mac OS X Address Book from LDIF files, such as those created when you export addresses from Netscape Communicator.
LDIF files are generated by programs like Netscape Communicator when you choose to export your data from the Address Book.
Address Book Importer has been tested with files exported from Netscape Communicator 4.7x. At the time of writing, Communicator 6 for Mac OS X does not support exporting LDIF files.