To explain a bit, what I'm trying to do is to get the most recent comment from each post instead of getting and displaying the most recent comments from all posts. You can see how it's currently implemented at http://relaxationcd.com/bizplansnw .
I haven't been able to figure out any way to get the latest comment on a per-post basis. Any suggestions on how to further modify the plug-in to do this? Or through WordPress' template tags/functions? I know WP has a comment_excerpt tag, but I haven't been able to get that to work at all.