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Google updates on its own terms as well and the ODP has no control over that.
On top of that, the ODP systems are undergoing an extensive upgrade; the current public pages are not necessarily reflect the most current version of the database, and RDF generation may be impacted as well (haven't been able to log in to see the status).
[webmasterworld.com...]
various explanations as to what is going on at DMOZ, and why you are getting "old copy"
The directory at Google gets an update by Google grabbing an RDF file from [rdf.dmoz.org...] whenever they feel like it. The RDF is always there, and a new one comes out normally about every week. Google directory is normally about 6 to 8 weeks behind the real live ODP listings.
I would be shocked if you got anything other than token referrals from dmoz.org itself. The dmoz.org search is primarily used by editors to return categories, which are much fewer in number and which change less frequently than listings, and right now I think most editors are intent upon having our limited staff resources devoted to installing and upgrading the backend servers.