I have installed IntenseDebate (I think) to track comments on my blog. If a post has a comment already, it will continue under the old tracking. Any new posts or previous posts with no comments appear to have converted to the new system. I probably could have converted them all (I think), but the Social Mediot takes it slow, so it is a going forward process only.
Please bear with me during the conversion, I pray it is painless. Try one.
HT: ChurchCrunch for getting me into this.