This was posted from w.bloggar, a free Windows client-side utility that works something like Semagic, through the XML-RPC API. It may have the ability to post to both WordPress and LiveJournal from a single item edited offline, which would be just about ideal for my needs. We will see. The next step will be to see if it can post the same item to both WordPress and LJ.
This item will go away (or be radically rewritten) once I figure out how it works and how best to use it.