My site was listed in DMOZ about 2 months ago. There is not indication from Google that it has found it. They have found other sites that include dmoz on their site but not dmoz itself. How long has it taken for others?
Keep in mind that Google doesn't crawl the entire DMOZ on a daily or even weekly basis. If the entry is on an obscure page within the DMOZ, it can be a very long time before Google ever sees it. Further, if the entry is on a particularly weak page within the DMOZ, that link might not carry enough weight to warrant Google's indexing a page/site for the first time.
just give them sometime and your site will be indexed aftert hey crawled through all DMOZ. like above said your site might be in a weak page so bot hasn't visited yet. it is not that "immediately" but still faster than you were link from other website. ^^
it's intresting . i have one web site which listed on dmoz and G has found it on the same day after listing has approved