I don't know if this will be helpful for any of you...it's pretty basic.

I wanted my Last Comment section to display tracbacks and pingbacks as well as comments. In order to do this, you change the _main.php file of your skin from:

<?php


   $CommentList = & new CommentList( $blog, "'comment''", $show_statuses,'','','DESC','',8 );

   $CommentList->display_if_empty( '<div class="bComment"><p>'.T_('No comment yet...').'</p></div>' );


   while( $Comment = $CommentList->get_next() )

   
{   // Loop through comments:

      ?>

to:

<?php


   $CommentList = & new CommentList( $blog, "'comment','trackback','pingback'", $show_statuses,'','','DESC','',8 );

   $CommentList->display_if_empty( '<div class="bComment"><p>'.T_('No comment yet...').'</p></div>' );


   while( $Comment = $CommentList->get_next() )

   
{   // Loop through comments:

      ?>

New trackbacks and pingbacks being displayed on the Most recent comments page is functionality from 0.9.1--I just wanted to adapt it to my 'last comments' sidebar list as well.

I have only used this fix in the 'plain' skin, and I don't know if it works elsewhere.