I always feel silly doing this, but I've done the upgrade to 3.17, for whatever reason. Followed these instructions. NoFollow still doesn't seem to work, but I'm not really concerned, presumably it won't affect anything. I hope to install the notifier when I work up the nerve.
Ok, found the nerve, and installed MT-Notifier. You can now subscribe to my comments and be notified when someone else posts. I can't for the life of me quite figure out how it all works, but if it gets annoying, just tell me and tweaking will occur. The check box is with the typekey comments box, and only there, since I can't be bothered to try again to fix the preview template. I'm assured that everything is very easily opt-out, so if you complain I will just mock you.
I've set it now that you're only notified of new comments, since RSS feeds are there for a reason. You will, however, be notified if the post is modified/changed/saved again.