The way it is now if you want to get email notification of new comments on sifts we did not post we have to remember to "bookmark" them. Something BTW that wasn't obvious to me and so I did not know how to take advantage of this feature for a long time.

Wouldn't it be great if next to the "Submit New Comment" button there was a checkbox that said "Bookmark (Email me when this sift has new comments)"? Checking it would bookmark it and unchecking it would unbookmark it.