Sue, would be useful if you post the URLs to other organisations... would make your post a little less self serving.
AWA:
http://www.awa.org.hk - women's group, and generally has a very multinational membership.
YWCA: Again a woman's group...
http://www.ywca.org.hk and it tends to be more local in nature than expatriate focused. However, its a good social group.
(By the way we've got an internal bet going on where you're going to try and slip your URL in again....

Would be nice if you actually bothered to respond to our email to you.)