Is the editor really a problem to solve for Markdown? Philosophically I regard Markdown as a language in the text-only-editor-unimportant family.<p>I recently built a (simple, only works for me) filter for pandoc that allows for formulas in Markdown tables. org-mode features is what Markdown is missing, but without the marriage to the editor.<p>At the same time: an editor like this makes Markdown more accessible for non-hackers, which is always good.