Submitted a site last week and the "thanks" page didn't show up. So I contacted one of the Editors who was kind enough to confirm the site was in the queue.
Once they have their dbase and hosting sorted out I think everything will be cool.
My personal opinion is that they were doing dbase maintenance and you can't really backup and fix something if you are still taking submits.
I have no idea how they run Dmoz, but it seems to me that they have a core of good editors and a load of people who sit back & enjoy the PR from their profiles.
