I have been using this new software to submit my sites to directories, let me know what you think about it: http://www.digixmas.com It really helps me out, I can send for free a site to 150 directories in less than an hour (all of the sites have PR 0), and if you pay US$10.0, you can send your site to all the list of directories they have (around 600, including PR 6,7,8 directories). Give it a try and let me know what you think.
I used it and was very impressed, although i am not familiar with automatic directory submittals, but it seems like it makes them very manual like. I would like to see what others have to say thanks Scott