Blog Comment Helping in Page Rank?

There are four types of blog commenting systems used by the majority of blogs:

1.
Blogs that use comment moderation and “rel=nofollow”. Reserved for blogs that receive a lot of traffic and want to make sure no comments are spam and no comments are left just for PR purposes.
2.
Blogs that use no comment moderation and “rel=nofollow”. Reserved for blogs that will let users post whatever comments they want, but the links will not serve any PR purpose but only traffic.
3.
Blogs that use comment moderation and links follow. Usually reserved for blogs that promote leaving comments because the links will follow, but don’t want many spam comments to plague their blog.
4.
Blogs that use no comment moderation and links follow. These blogs have no comment moderation meaning comments will go up instantly and link follow through to your website to boost in PR.

The PageRank Search tool allows you to search Google using any keyword(s) you wish. It will then return, in order of Google relevance, the sites associated with those keywords. Each result displays a graphical bar with the PageRank of that particular site.