Very little I get about 5 a month last month I did not get any though, the big advantage with being in DMOZ is that others use it for a big part of there ranking and indexing.
Those visitors might be teen Dmoz editors. Also I think it is possible that people who surf the web will bump into dmoz in some point of their lives (Dmoz have millions of links) but just will/do not realize what it is or remember. I realized that I have visit dmoz before, but then (I didn't know what I now know) I thought Dmoz was like another search engine
http://www.alexa.com/data/details/t...size=medium&range=6m&url=http://www.dmoz.org/ - draw your own conclusions. Note that editors use a different password protected version - which accounts for 15%, the rest is most certainly non-editor visits.
You have forgot all the webmasters who only come to DMOZ to submit their site. Since most webmasters, specially the new ones who are impressed about Alexa ranking, have Alexa tool bar installed, it will automatically results in high Alexa ranking. Give me any unknown web site with no traffic and I will have it at under 100,000 mark in Alexa in about 1 month. Alexa ranking is meaningless for determining a web site popularity or usability.
As I said, draw your own conclusions. Note the use of Search though - might well be submitters checking on their suggestions. One way of actually increasing the popularity of DMOZ, which goes hand in hand with recruiting new editors and therefore improving the rate of new sites being added and quality control, is to vastly improve DMOZ search and make it current. To do that you would need to redesign the database. Did you want a hook for your related suggestion? That might be it...