I think it should show a link back to the page commented on.
(BTW, the rss feed in this situation seems ok; there the link element
points back to the parent page.
+* It would be useful to have a pagespec that always matches all comments on
+ pages matching a glob. Something like `comment(blog/*)`.
+ Perhaps postcomment could also be folded into this? Then the pagespec
+ would match both existing comments, as well as new comments that are
+ being posted.