Link Exchange Directory – Quite stupid submission form. This directory based on reciprocal link, but they required exact link as in code provided. Why I said that is stupid? Because I can change code after they include me in directory. Traffic Rank for addurldirectory.com: 386,056 (as today) Submission form is not too short and most fields is mandatory. I don't know if it worth for you or not to be in this little known directory. Up to you.
LinkCentre.com – You need to select appropriate sub-category to reach submission form. Form is not too long, description is 100 characters, personal info is not mandatory, but if you put your email address they will send you confirmation with contact info. I recommended this directory.
Lockergnome – It was easy to fill out, that is nice. Required reciprocal link and ask via email to send back URL where reciprocal link placed. If you not do so in 2 days they will remove your listing. I think its fare. I recommended.