Problem with mailing list form on ww.wp.xz.cn

I just wanted to report that I tried to join the wordpress announcement list via the form at the bottom of the ww.wp.xz.cn pages. I got a “500 Internal Server Error” message. What makes this more troublesome is that the mailing list page itself does not give any alternative way to subscribe to the list. I believe I am subscribed now, since I checked the “join list” box when I registered for the forum, but I am also not sure.