have you tried some twitter bot ?for auto posting?
So why do people comment on your blogs? Do get some visibility? To get some recognition? To maybe get a backlink or two?
Well none of that will happen for them if no one knows about the post they just made a comment on. You need to tell others about your post, and now comment makers can actually automatically tell others just by making the comment.
I just added a new plugin to my WordPress Theme called VikingHammer Tweet. See details: http://www.bestwebimage.com/archives...loggers-dream/
VHT automatically posts to your Twitter account anytime you make a post, or any time someone posts a comment on that post. Check it out!