This blog is hosted by wordpress, but the comments are hosted by Disqus (which hosts the comments of The Randomly Grad Life). I’ve set the comments so that anyone can comment without having to login to Disqus, but it should be known that Disqus is a commenting system that is rapidly growing all over the web so it may be worth your time to signup for a FREE account. I’ve also set it up so that if you have an OpenID, Google, Yahoo, or Facebook account you can login with those accounts as well.
My understanding is that you can receive notifications through those outlets for comments and replies to comments. I know it works with Google and Disqus, but I’ve never tried the other accounts. Play around and let me know what you discover, and most importantly figure out what works best for you. Let’s communicate!