Dirk, you may know this, but address-book-lite (Jon's package) is, as far as I understand it, just a UI built on top of the telecom-number, postal-address, and possibly organizations.
It might need some updating, too, because organizations has gone through some data model changes recently.
I'm not certain that it is just a UI on top of these things, but I believe that's what he's done.
I'd encourage you to use something that builds on telecom-number, postal-address, and maybe organizations.
