I've been using www.dirtracker.com to submit links to directories and it has helped me tremendously. Not only can I find new directories but i can track them to see which ones I've already submitted to. Thanks dirtracker.com.
I am actually the owner of DirTracker.com and can assure you this is not a paid advertisement, and thanks Gritz for the kind words. Theis site gives users a chance to submit and keep track of over 2000 directories. Also members can add their directories to the list for others to submit to, a great way to boost your link submissions.