Track Comments with Co.mments
I've been using for months now and Co.mments is by far my favourite way to track comments on a site.
How does it work? Through the use of a bookmarklet, I just hit a button on a page whose comments I wish to track. It doesn't matter if the site uses WordPress, Movable Type or a custom home-grown solution. And you don't have to leave a comment in order to continually track the page.
Even better, you don't even have to create an account to use it. It'll remember the sites you're tracking through the use of a cookie. If you do create an account then you have them safely stored if something happens to your cookie or if you want to access your account from another browser or computer.
When tracking sites, it'll ping and update with the number of new comments. You can even read the new comments right from Co.mments without having to return to the site. With that said, it's not perfect. It must have some algorithm for determing comments on a page and certain HTML structures prevent it from pulling out comment text or updating the number of new comments. The accuracy, in my opinion, is still really good, though. Probably around 95%.
For those blogs that don't get tracked properly, at least I have a central place to keep an eye on articles that I wish to check back on.
After the discussion has died down and I'm no longer interested in tracking the page, I simply remove it from the list.
If you need a handy way to track conversations, I recommend you head on over to Co.mments.com and give it a try.