In defense of the adult side of DMOZ - and Im not on the staff there- Jezebel and a gaggle of others over there do a fantastic job - especially knowing that its all volunteer - and there are avenues to check a submit you've done to find out the status - Ive dont it myself recently and the response was immediate and helpful.
In the past there have been isolated instances (actually way in the past there were a heck of a lot) of people abusing their positions there - but that seems to have been weeded out pretty well on the adult side - the mainstream side I wont comment on
As far as the question about multiple domain entries - I know I have many domains with loads of listings - that comes with the territory of building free sites on the same domain - you can have as many sites as you want on a domain and each is considered separately for DMOZ - as they should be.
Ive seen a lot of bad entries get cleaned out of the adult side as well which in my experience has been good for the biz - the cat editors seem to take a good personal interest in their cats.
the original issue with the DMOZ directory and Google - I dont believe that Google has brought in a good RDF for a while - the results look like Google is trying to parse the database with filters that arent responding correctly - and unlike the past when they did all of this on a datacenter that nobody knew about before they made it live, so many know about all of the datacenters now that Google has given up trying to do it in the background and just lets whatever they have at the moment go live
I have to believe, and based on the hard results that appear on reloads, that the update of the directory, the PR update and a few other things are not done - and wont be for a few days.
Forgot - actually I believe the cat editors are encouraged to have experience in the category they are editing - and are allowed to add their own sites if they fit the cat.