A little late but here's couple of experiences: submitted a site in early September and it was listed in late October; another was submitted around mid May and listed sometime before the end of last year. Probably pure luck, but as far as I can tell, DMOZ is still listing sites that are submitted. You just never know when and it's not worth fretting over.
I have not bothered with them since the turn of the century and have only seen their listings get worse.
Besides, it really does nothing for page rank or link backs except for 1 backlink if you find someone who does not find your site threatening to the sites they protect there.