I wonder if the comments could be an ALT tag to whichever comment-icon you choose? That way the comments would pop up/minimize just by moving a mouse, and clicking on the icon would bring you into the dialog.
I could see how the filter/robot that deals with static pages by adding gc content to the bottom, might be changed to support the quicktopic method of automatically associating gc links to various HTML tags (like H1, H2, ..., TH, TD, ...).
