Comments are an important part of blogging. Comments encourage discussions and improve interaction. So having an improved and enhanced comment plug in makes sense .
Intense debate is really good commenting system which has a lot of great features. With intense debate users can respond to individual comments making your blog more engaging, comment moderation is easier.

To use intense debate you have to sign up on their site and install the widget on your blog (plugin for word press) now comments will be visible both on your blog and intense debate site (i.e your dash board)
Other features of intense debate include rating of comments and approving comments via mail.
Intense debate also lets you easily figure out your most commented articles and also allows you to import your existing comments. Also users have the option to login with their Intendebate id or open Id to post comment.
Set up your account IntenseDebate comments enhance and encourage conversation on your blog or website