Or, you could download and install Symas OpenLDAP for Mac OS X which is up to date and supports all the functions of OpenLDAP. Just a thought. Apple has announced that Leopard (coming RSN) will have a much more up to date OpenLDAP installed with few actual proprietary mods ... that will be cool, too.
Thanks. Nicely put and plenty to think about. I wonder if the real responsibility of the Aggregator isn't to collect the identity information in such a way that the collection of data has a minimum of ambiguities by design? From any richly understood identity, one can probably derive RDF representations of several "masks" worn by the same person or thing .
My recent projects in address book directory design for mixed business and personal use have me circling this subject and I appreciated the viewpoint you offer here.