I've just had a friend (well, client really) email me asking for help, because apparently his Address Book has been "lost" and he can't add new names to his address book either. Can anyone tell me where Address Book stores it's database? I know there's an option in the File menu to back the database up, but I don't think he's done that. I'd like to look for the file Address Book uses, and check to see if it's really blank, or if it's just been corrupted. The fact that he can't add new names makes me think it may have just been corrupted. Thanks!