This blog is a certified do follow blog now.  I just learned from lots of bloggers and different source I read that do follow blog will increase the backlinks and will increase your page rank.  You can read more information about DoFollow FAQ from Page Rush.

What is “Dofollow”?

Dofollow refers to normal links that do not have the “nofollow” tag. Websites that do not use “nofollow” are called “dofollow”. Both types of links look exactly the same when you view a Web page. However, when you look at the HTML for a Web page (by viewing the text of the source file), you can tell the difference.

Search engines (such as Google) ranked pages based on the number of dofollow links that pointed to them.  So, if your blog is dofollow, the commenters will keep coming back because it increases your bank links.  That is some bloggers who have dofollow blogs they moderate their comment box so spammers won’t benefit any back links from theirdofollow blog.

Well, for me Ijust want my commenters to keep coming back and leave valuable comments that related to the topic and get banklinks as well. As bloggers, we always want our blog to get rank by google and dofollow blogs would perhaps help toher fellow bloggers.  Visit the link so you will know how to spot the dofollow and nofollow blog.

Why dofollow is better than nofollow?

Not only does nofollow fail to stop spam, it denies honest commenters and site participants a small but important reward. A normal dofollow link is a nice reward to a person who contributed a thoughtful remark on your site. Making your site dofollow, telling others that it is dofollow, and rewarding commenters will motivate more visitors to spend time on your site and provide valuable comments.source:pagerush