Right now, each line that is commented on causes an email
to be sent to the author. That might be a lot of
emails for a big review. I'd like a way to be able to
batch together several comments, and then say "submit
comments", which would then send one email. But you'd
have to make it clear to the user that they needed to
submit the comments - otherwise people will make a
bunch of comments and then forget to submit them.