Matticus, are you any good at fiddling with PHP?
There is a way to check the comment type (whether it's an actual comment or something else) in the foreach loop by calling get_comment_type() on the $comments, which will return 'comment' if said comment is a true comment (left by a person).
(The foreach loop is on line 27 on the default WordPress theme)
http://www.dailyblogtips.com/separate-t ... ress-blog/
http://www.problogdesign.com/how-to/sep ... -comments/
http://www.noscope.com/journal/2005/01/ ... -pingbacks