find a website that offers articles and then email them and ask them if you provided an article with a link pointing to your site would they include it, 99% of the time they will say yes! Because it is free content for them and once you build up a relationship you can be their sole contribtor of articles dominating your niche.
I haven't checked it into minute details, but it seems to be some useful information that you are giving here. The problem is again how many of these will remain to provide "DOFOLLOW" links. The last list seems to be the most valuable to me. Are these all DOFOLLOW article directories?