MySQL is the only way to extract our user_map table. We don't have an export functionality. If you're looking to get user profile data and such, you'd need to export the #__users table and whatever tables you're storing profile data in. Our #__jfbconnect_user_map table just stores the social network information of a user, not any real profile data or other details about that user.
I hope that helps explain, but if you need anything else, just let me know.
Thanks,
Alex