Welcome to SEO Factor's Directory of Directories (and social sites). The idea is to compile a list of decent directories and social sites to help you market your website more effectively.
To read a bit more about what metrics I check before submitting a directory to this directory, feel free to read the blog post Determining A Good Directory. The metrics here are the most common that I look into.
Also note that if you have a directory, you may submit it for review, and I'll take a look at it as soon as I can.