I've written two posts so far and already I don't like the Blogger editor. I like working directly in HTML, so I decided to make my own:
It's a bit basic for now, but I have Grand Plans for it, including the ability to link to a remote stylesheet, adjustable pane sizes, auto-saving,
and magic scrollbar position matching, although that last one might turn out to be rather hard. I shall need to research the matter. (it was actually quite easy, even if I did use a non-W3C-standard property)
I rather suspect there'll be some kind of security issue with allowing anyone to insert whatever code they want on a page on my site, but for now I shall just trust to anonymity.