Replying to other replies in the comments of art, blogs, statuses, and so on.

For now you can only reply to the original comment. It's not possible to keep replying to to same thread. It's just a one and done deal. Any extra comments made need to be to the original comment or as a new comment. It's not ideal since it would give the notification to the wrong user and create a potential mess in the comments. Is this something being considered?