From the authors of wp-Typography comes wp-TrackbackPopup.
In WordPress the default trackback link behavior causes persistent user confusion. Knowledgeable users right-click on the link and copy the link location. But the vast majority of users click the link — expecting to copy the link from the browser’s location bar — only to be redirected back to the very page they were on. The standard implementation does not provide the expected result.
wp-TrackbackPopup resolves this issue. It uses unobtrusive JavaScript to create a popup window when a user clicks the trackback link. The popup window provides a text version of the trackback URL for easy copying and pasting.
The popup window may be styled to match your existing theme.
View the wp-TrackbackPopup homepage for more information.