I haven’t found anything that works yet.
I’ve been using the Xhina Here! plugin for Firefox to do my writing/editing. It doesn’t have a spellcheck either, so once I go back to WordPress (with the WYSIWYG editor turned off) I have to use the Google toolbar for spellcheck. It works fine if the WordPress WYSIWYG is turned off.
But that’s adding an extra step to the whole process.
I’m probably going to go back to using ecto as my blog editor, and just use the WordPress interface for updating my theme, adding links, and other admin-related tasks. Yeah, I <i>could</i> just use the quicktags or do the coding myself but I’d rather not even <i>see</i> code when I’m tryin gto write or edit.