This is a tool to find blogs appropriate to your keywords so that you can post comments on their sites. The program qualifies sites with nofollow and dofollow tags so that you can select to post on sites that will give you a good backlink.
I tried the free edition today. It worked quite well although the free edition is limited to 50 blogs, and of those 50 only 2 had dofollow tags in the results for my particular phrase. The Gold edition lists unlimited results, but costs around $60.
IMO the program works well enough, but I have a problem with the method. To maximize your backlink the idea is to post your keywords as your name, so that the site link becomes a contextual link.
I tried it a couple of times, but it feels like spamming and I won't be doing it anymore. I also suspect that most site owners will delete comments with keyword names nullifying the efforts made anyway.
Anyway, have a look at make your own judgments.
http://www.fastblogfinder.com/