Here is an article with over 25,000 directories to submit to...provided you have the time!,000-directories-to-submit-your-web-site-to-for-increased-traffic-and-better-search-engine-optimization

Okay, so nobody has the time to submit to 25,000 directories, but submitting faithfully each week to the directories with the highest Google PR, Alexa Traffic Rankings and those related to your website will help you get traffic and improve your search engine rankings.