This is amazing – a Firefox extension allowing in-browser, near-wysiwyg editing and posting: Performancing for Firefox.
Performancing for Firefox is a full featured blog editor that sits right within Firefox. Just hit F8 or click the little pencil icon at the bottom right to bring up the blog editor and easily post to your WordPress, MovableType or Blogger blogs.
I’ve been playing with it a bit this morning, and although the UI is still a bit sketchy (on a Mac, at least) and it doesn’t insert p tags as rigorously as I would like, this seems to be a wonderful tool. Check it out.