Comment stuff in general (outside of inbox notifs) is tbd right now - there will definitely be a way to get comments on your own entries, and there will hopefully be a way to get comments on other people's entries, but comment pulls can be more server-intensive and we have to work out what people expect for privacy (because it would be really easy to, for instance, download someone else's entire journal that way), so there's a bunch of boring high-level discussions that need to happen first.