Method one: There is a theme called Jillij designed special for pull-down menu. You can download it at:
http://www.jillij.com/2007/04/21/jillij-theme-v90/

Wordpress just released version 2.2 two weeks ago. It has a bug which does not support unicode fonts such as Chinese and Thai. What you need to do is to disable the following two lines in wp-config.php:

define('DB_CHARSET', 'utf8');
define('DB_COLLATE', '');

Change those two lines to:

//define('DB_CHARSET', 'utf8');
//define('DB_COLLATE', '');