I have been using this site/tool and it is absolutely free. Semi-automated submission after you have entered your info it auto fills to the directories and then you submit (after choosing categories and adding a captcha)! You can choose who to submit to and it keeps track of them so you don't submit twice. While monotonous, effective and very easy FREE tool.
Best I've seen and a good way to increase PR & link popularity.
DIRZAP.com - Fast Semi-Automated Directory Submission
I am not affiliated with DIRZAP, but think this should be shared with the domainer community. Pass it on to other groups.