Ezinemark is one of the lesser known but growing article directories I have been using lately. It's a nicely designed and efficiently run directory with a PR of 4.
I have submitted a few articles there, and they all get approved pretty quickly. That's good to know. Also, like Articles Base and Sooper Articles your articles can be found in Google search results almost immediately after they've been published there. So that's another sign that the search engines crawl it often and regard it highly.