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BUT, the DMOZ database is used by ~4000 other sites as their directory (eg Google, AOL, ScienceDaily, etc etc) --- a surprising number of which are indexed in Google and do have some PR on the deeper pages. The DMOZ bashers like to suggest that Google gives no weight to these ~4000 clones due to duplicate content issues, but no one really knows (so its just 'wishful thinking')---- as so many of them are indexed by Google and have some PR, that no looks like a duplicate content filter to me.
If the title used by DMOZ is also your targeted keyword ..... that up to 4000 keywords in anchor text rich links to your site!
If your regular activity in life is thinking only about pushing one site above another of no less merit, then it's easy to get into the habit of assuming everyone thinks like that. But that's the exact opposite of the "Google approach", which as much as possible avoids manual tweaking unless there's a SERIOUS problem -- the searchking emergency, etc. I wouldn't expect them EVER to CONSIDER manually tweaking sites up. For the small possible gains, it's not worth it. Far better to attempt to determine algorithmically what is common to all the good sites, and promote that.
Dmoz is a recognized authoritative source. It earns this reputation just like any other authoritative site, whether that be the BBC, Webmasterworld, or whoever. Getting a link (of the same PR) from dmoz is better than getting a link from some blog spammed piece of crap site.
does google weigh this more then a link at other sites?
Google certainly should give a DMOZ link extra weight, considering that DMOZ only admits worthy sites, unlike link farms that will take anything.
But alas, Google has never stated that they do so.
I still think they probably do, but that's my personal opinion.