Listing in Dmoz is not so frequent and it takes some time but how much that is not confirmed in my view.
It all depends on what section you submit too, some sections have great modertors and listings can be online with in a couple of days but there are alot of categorys with out any mods.
It's like you just submit your site there and forget it and then keep on checking every month or week.
yeah just submit your site on dmoz And after that just forget it , if you are lucky then your site will be index in Dmoz in two or three months
I have no idea because i have submitted my website to DMOZ since last 5 months and has able to get approved there.