Can hash URI description lookups be made to scale?

Hi All,

Apologies if this is a FAQ.

At work we have an ldap directory containing a few 10000s of employee
entries. I've recently installed a servlet to provide rdf foaf
descriptions of these people on demand.  The URI of each person is
currently of the form e.g. http://example.com/2004/01/people#dawesp

I prefer hash URIs on the basis that they look nicer to me. However,
I'd like a to provide a description lookup service at the end of the
URI. 

I can see how to do this with URIQA MGET. I can also see how to do
this easily with HTTP GET on slash uris - a simple "303 see other" to
the servlet to generate the appropriate RDF description.

But with HTTP GET on hash URIs (if I understand correctly) the hash
doesn't necessarily get to the server, so what's the best way to do
this?  I don't really want to serve a page with everyone on it
(~gigabyte of data) 
Does this prohibit hash uris for this type of service?

Any help would be much appreciated,

Many thanks,

Phil