Part of the new blog setup is the "threaded comments" feature, so replies show up beneath the original remark instead of being in a long chronological list. However, that can be confusing when it comes to figuring out what the new comments are, so I've re-instituted the old "subscribe to comments" option:
That's at the very bottom of the full-post view. Just check the box and you'll get an email whenever a new comment is made, at the address you provide in your own remarks.