Apple's Workgroup Manager (used to add, edit and delete user accounts from Open Directory), does not provide much information about the users for viewing by Address Book (e.g. even the users email address is not entered by Workgroup Manager). While it is possible to manually (and tediously) add this information using the Inspector Tab in Workgroup Manager, I have written OverDose to try and make this easier (including if possible auto-filling fields).
What's new in OverDose
Version 1.1: Added options to convert or clean up records if you have user names in the format "Smith,John" rather than "John Smith".