Index: wp-includes/comment-template.php
===================================================================
--- wp-includes/comment-template.php	(revision 15939)
+++ wp-includes/comment-template.php	(working copy)
@@ -1353,7 +1353,7 @@
 		<?php printf(__('<cite class="fn">%s</cite> <span class="says">says:</span>'), get_comment_author_link()) ?>
 		</div>
 <?php if ($comment->comment_approved == '0') : ?>
-		<em><?php _e('Your comment is awaiting moderation.') ?></em>
+		<em class="comment-awaiting-moderation"><?php _e('Your comment is awaiting moderation.') ?></em>
 		<br />
 <?php endif; ?>
 
Index: wp-content/themes/twentyten/functions.php
===================================================================
--- wp-content/themes/twentyten/functions.php	(revision 15939)
+++ wp-content/themes/twentyten/functions.php	(working copy)
@@ -308,7 +308,7 @@
 			<?php printf( __( '%s <span class="says">says:</span>', 'twentyten' ), sprintf( '<cite class="fn">%s</cite>', get_comment_author_link() ) ); ?>
 		</div><!-- .comment-author .vcard -->
 		<?php if ( $comment->comment_approved == '0' ) : ?>
-			<em><?php _e( 'Your comment is awaiting moderation.', 'twentyten' ); ?></em>
+			<em class="comment-awaiting-moderation"><?php _e( 'Your comment is awaiting moderation.', 'twentyten' ); ?></em>
 			<br />
 		<?php endif; ?>