I've been using XEmacs on windows a lot lately to edit .zpt and .dtml files (template files for Zope) and to get automatic html-mode on these files you need this in your .emacs or 'custom.el':

 (add-to-list 'auto-mode-alist '("\\.zpt$" . html-mode))
 (add-to-list 'auto-mode-alist '("\\.dtml$" . html-mode))

I often find that typing in text in some textarea boxes on webpages that the size of the box is too small and I wish I could expand its size like I can with a running GUI program like Notepad or XEmacs. Here is now my experimental attempt of solving that problem. I've only tried it in Firefox (Linux) and Konqueror (Linux) so far. It did not work in Konqueror :(

I've been trying to use Xjed recently instead of XEmacs because XEmacs took more than 3 seconds some times to start. If I have to start the editor many times in the day this really matters; and this happens when I use the ExternalEditor for Zope.

If you use Gmail but haven't started to use the keyboard shortcuts, then you're really missing out on something.

Finally I have a sensible editor installed on my Intel iMac. It's called Carbon XEmacs (aka. just emacs :)