Index: class-wp-ms-sites-list-table.php
===================================================================
--- class-wp-ms-sites-list-table.php	(revision 29094)
+++ class-wp-ms-sites-list-table.php	(working copy)
@@ -98,7 +98,12 @@
 		} elseif ( $order_by == 'blog_id' ) {
 			$query .= ' ORDER BY blog_id ';
 		} else {
-			$order_by = null;
+			 $orderby_from_plugins = apply_filters( 'wpmu_blogs_orderby' , $order_by ) ;
+            if ( ! (is_null( $orderby_from_plugins )) ) {
+                $query.= $orderby_from_plugins ;
+            } else {
+                $order_by = null ;
+            }
 		}
 
 		if ( isset( $order_by ) ) {