--- mailchimp/mailchimp.module	2008-12-23 19:12:55.000000000 -0500
+++ mailchimp.new/mailchimp.module	2009-09-16 20:03:44.000000000 -0400
@@ -120,7 +120,15 @@
     $account = new stdClass();
     $account->roles = array( 2 => "authenticated user" );
 
-    $lists = _mailchimp_get_available_lists( $account, $q );
+    $cache = cache_get('mailchimp_lists');
+    if ($cache){
+      $lists = unserialize($cache->data);
+    }
+    else {
+      $lists = _mailchimp_get_available_lists( $account, $q );
+      cache_set('mailchimp_lists', 'cache', serialize($lists), time()+60*60);
+    }
+
     if(!empty($lists)){
       foreach ($lists as $list) {
         if ( variable_get( 'mailchimp_list_'. $list['id'] .'_listtype', '' ) !== 'required' ) {
@@ -784,4 +792,4 @@
     return NULL;
   }
   return $q;
-}
\ No newline at end of file
+}