Is the address_book portion of ZCS 7 implemented in LDAP? I read, about a week ago, a thread on the forums that I haven't been able to find since. It suggested that MySQL was the base, not LDAP.

I'm looking for a tool that will allow me to synchronize address_book records from a ZCS server to Google Apps: in such a way that the records would then be available (with type-ahead, in particular) to users of a GApps organization's gmail users and would update contact information on their smart phones (iphones and androids, primarily).

If there isn't an actual tool out there, I'd like to know which developers (in terms of areas of expertise) I'd need to contact about building one.