diff -rupN ../views/modules/taxonomy/views_plugin_argument_default_taxonomy_tid_node.inc ./modules/taxonomy/views_plugin_argument_default_taxonomy_tid_node.inc
--- ../views/modules/taxonomy/views_plugin_argument_default_taxonomy_tid_node.inc	1970-01-01 10:00:00.000000000 +1000
+++ ./modules/taxonomy/views_plugin_argument_default_taxonomy_tid_node.inc	2011-02-14 10:54:25.000000000 +1100
@@ -0,0 +1,39 @@
+<?php
+// $Id$
+/**
+ * @file
+ *  Argument default plugin for taking taxonomy term tids from the current node.
+ */
+
+class views_plugin_argument_default_taxonomy_tid_node extends views_plugin_argument_default_taxonomy_tid {  
+  /**
+   * Get an argument from the current node's taxonomy terms.
+   */
+  function get_argument() {
+    // First, try to get a node from the menu router system.
+    $node = menu_get_object('node', 1);
+    if (!empty($node)) {
+      // If our argument is set to validate the term, only pick out
+      // terms from the node that are in those vocabularies.
+      if ($this->argument->options['validate_type'] == 'taxonomy_term') {
+        $valid_vids = $this->argument->options['validate_argument_vocabulary'];
+        foreach ($node->taxonomy as $tid => $term) {
+          // This has VID => VID for selected ones, and VID => 0 otherwise.
+          if ($valid_vids[$term->vid]) {
+            $tids[] = $tid;
+          }
+        }
+      }
+      // Otherwise, take all terms from the node.
+      else {
+        $tids = array_keys($node->taxonomy);
+      }
+
+      if ($tids) {
+        // Transform the argument to a string of comma-separated tids.
+        return implode(',', $tids);
+      }
+    }
+    // Views will just do nothing for this argument if we end up here.
+  }
+}
diff -rupN ../views/modules/taxonomy.views.inc ./modules/taxonomy.views.inc
--- ../views/modules/taxonomy.views.inc	2011-01-12 10:45:14.000000000 +1100
+++ ./modules/taxonomy.views.inc	2011-02-14 11:04:11.341959999 +1100
@@ -466,6 +466,12 @@ function taxonomy_views_plugins() {
 //        'parent' => 'fixed',
 //      ),
 //    ),
+    'taxonomy_tid_node' => array(
+      'title' => t('Taxonomy Term ID from current node'),
+      'handler' => 'views_plugin_argument_default_taxonomy_tid_node',
+      'path' => drupal_get_path('module', 'views') . '/modules/taxonomy',
+      'parent' => 'taxonomy_tid',
+    ),
   );
 }