If someone got a dmoz link 4 years ago or more it was gold. That link meant 300+ links from directories that used the dmoz database. Basically if you got in there you had it made and could rank for anything, if you were willing to do a little bit of SEO on the side. Especially if the link was anchored properly. But I don’t think many new directories use the dmoz database anymore, so while a dmoz link is good now, it’s not as important as it used to be.
I had casinoranking in dmoz for less than 24 hours once. I made the mistake of contacting dmoz and reporting someone who had stole my website design and content who was also in the directory. I gave them proof of this. So whoever received that email replied to me saying he was taking both links off. I do think that if I had gotten that link to stick I would be dominating by now. But such is life.