When Disqus first launched, I was a little critical because I like to maintain control of comments, give commenters the benefit of Dofollow links, and ultimately retain control of their user generated content.
I now feel that 95% of bloggers should switch to using Disqus, though I have some reservations.
These are some of the reasons why:-


WordPress Comment SEO Solutions
Changing the way WordPress and other content management systems handle comments for SEO, members areas, aggregated conversations & more.
I am sure some of this post is going to blow people’s brains, though this is only the tip of the iceberg.