CommentLuv is a WordPress plugin and it was created to grow the blogging community and encourages blog readers and other blog owners to leave a comment.
If you'll enabled CommentLuv on blog, then a user who leaves a comment on your blog posts, the plugin automatically goes out and searches their blog for the latest post, then CommentLuv will automatically include a link to latest or one of their blog posts at the end of their comment.
Benefits from CommentLuv
* from CommentLuv plugin you can get quality comment's and it may help you to keep your content fresh.
* new comment makes your blog alive if no comment on a post it make that post dead.
* having lots of comment will show new visitors to that people are more interested about your blog and contents.
Get latest CommentLuv plugin from here : http://wordpress.org/extend/plugins/commentluv/