Address book or LDAP?

[zinneken]

I would like my FM contacts DB as central contacts list for everything on my mac (mail, address book, ical, invoicing software, excel, etc.)

What am I better off to use?

For me, the better way seems to be an LDAP directory with groups and contacts that would be managed by Filemaker and be available in apple address book. Eventually, I could share the LDAP with others, use it for mailings, use it for login and password storing for users to access FM and so many other functions. But can FM manage an LDAP directory, and if so, how to implement it?

The alternative would be to have a way to synchronize my FM contacts with Apple Address book, and have logins and passwords, mailings, etc. managed by and within FM. But is there a utility that can synchronize a FM contacts DB and Apple Address Book?