Off course it is hard to become a DMOZ editor since 4 years ago, it is not a new thing. To become a DMOZ editor today is like applying for an editorial post in Houston Chronicles.
Yes it is very hard to become an editor in DMOZ. however, I can see both sides of this argument and DMOZ has to be careful who they approve to be editors. I am not a DMOZ editor by the way. i think people worry too much about DMOZ, who cares promote your site in other ways.