No, I don't like the new WordPress editor. This post is being posted using the Performancing plugin for Firefox. Unfortunately, it doesn't do everything that I want it to – for instance, it doesn't have a Post Slug edit facility that I can find. However, not a bad bit of code, at first look. Assuming that it's a XUL app, I'll pull it apart and see what makes it tick.
This has given me an idea – rather than trying to fight the WordPress code, I might just write my own posting programme (in Perl – yippee, no PHP!), leveraging XMLRPC as the Performancing code does.
Update: I've decided that I like the Performancing app sufficiently that I've joined the community. Watch this space.