I have article directory - http://www.auram.net/ Actually I've listed it for sale, but it does not mean I cannot ask, you dear DP members what do you think Do you like design? How do you feel about the idea of article directories yourself? Have you got experience earning from article directory? What's you record? Mine - constant number of $20/day (site was sold after month of reaching this constant number).
This looks like a well developed site. I like your directory structure it's nice and clear and you've got loads of content!