+**'avatar_lookup'** - called when looking up the avatar
+ $b is (array)
+ 'size' => the size of the avatar that will be looked up
+ 'email' => email to look up the avatar for
+ 'url' => the (string) generated URL of the avatar
+
+
+A complete list of all hook callbacks with file locations (generated 14-Feb-2012): Please see the source for details of any hooks not documented above.
+
+
+boot.php: call_hooks('login_hook',$o);
+
+boot.php: call_hooks('profile_sidebar_enter', $profile);
+
+boot.php: call_hooks('profile_sidebar', $arr);
+
+boot.php: call_hooks("proc_run", $arr);
+
+include/contact_selectors.php: call_hooks('network_to_name', $nets);
+
+include/api.php: call_hooks('logged_in', $a->user);
+
+include/api.php: call_hooks('logged_in', $a->user);
+
+include/queue.php: call_hooks('queue_predeliver', $a, $r);
+
+include/queue.php: call_hooks('queue_deliver', $a, $params);
+
+include/text.php: call_hooks('contact_block_end', $arr);