I've upgraded the site to the new, improved SiteX 0.7.3. The main new feature I was after was ... finally ... a security code for the Guestbook and News comments. I also wiped the guestbook and comments (again) so we now have a clean slate. If you left a comment before and it's been cleared, you are now safe to post it -- this time it will actually appear!
Thanks to BJ Sintay for making this possible.