Thats a good point - what do Google gain by updating the Directory more often? DMOZ make available an updated file weekly for its downstream users (Google is only one of 1000's). 1000-4000 sites get added to DMOZ daily or weekly (sorry I forgot which it was) - but given that there are 4 million sites there, this is not a great % increase. Why would it matter to Google if their current Directory has 150 sites in a particular category or 151 if they updated more often. It may matter to the webmaster, but Google's concern is the searcher - so if not updating its not impacting on the experience of the searcher, does it matter?

If you go to DMOZ and search for 'sites using ODP data', you get a good list. I recently checked some of them out and was surprised at how up-to-date they were - even the obscure ones with no PR on the home page. It is someone paradoxical that the least used DMOZ clones are updated more often than the most used one .... just don't figure :-)

CBP