Just a few comments on comments ...
I'm working with JS-Kit. They have moved all the old comments over to the new database.
Hopefully we can have the default be "flat". And we can add a refresh (that takes the user to the bottom).
JS-Kit will also be adding the following features:
number of users on-line, this is in discussion and has no ETA date
no preview button (comment form is WYSIWYG), but they are adding an "edit" button so users can change their comments later.
visitor URL in comment will be added soon.
number of comments within pop-up will be added.
Best to all. And thanks for your patience.