I have yet to find one blog who's comments have followable links.
So then I did a test on my own Wordpress blog, and the link I left in a comment is also highlighted as no follow *using the Search Status tool):
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It seems to be a default setting (that links in comments are "no follow"), because I didn't set any attributes to make my comments "no follow".
Has anyone had much success with blog commenting for SEO purposes? how do you find those blogs?
I plan to add great content in my blog posts, as not to come across as spamming.