I have been reading as much as I can get my hands on about SEO techniques including link exchanges. I have read that they are the best thing in the world and also heard that they can be useless if the PR is not there and if they employ the "do not follow" tactic.

I have been searching for forums and blogs that do not employ the "do not follow" on their links and I have to say the pickings are very slim. I have gone to some sites that say they have lists of forums and links that do not employ this tactic, but have only come up with a couple that are worth mentioning. The majority of the site did in fact have "do not follow" links on their posts.

Where can I find a good source of forums and blogs that do not use the "do not follow" on their sites?