Very hard to get listed in DMOZ these days. One of the big advantages of DMOZ is that the submission is done through manual approval. The down fall however is that they don't re-visit their listings (EVER). So companies and listings that existed in early 2000 still exist today.

We've tried to get one of our old companies DE-LISTED as the information posted is no longer relevant to our business - but our requests go unanswered. New companies that I've tried to list for clients are going in excess of 6 months without responses.

Still viable in that the search engines love them - but they seem to be one of those places that if you're not already listed, it'll be hard to ever get listed.