Directories are getting popular not because of there content or editorial feature. They are made popular by link builder every body need a link to
improve link popularity and to increase there search engine ranking and directories are consider as the best, free and easy source of getting the links .There I was finding the list of directories have found two directories of directory
http://www.finddir.com
http://www.webdirectories.in
http://www.seowebdirectory.com/Internet_Directories/Directory_of_Directories/index.html
My you can find few quality web directories in above so called mother of directories to get some useful links