While I share some of his enthusiasm (albeit not particularly for markdown tools), I'd observe that considering the rich content produced by the editor, Wordpre

While I share some of his enthusiasm (albeit not particularly for markdown tools), I'd observe that considering the rich content produced by the editor, Wordpress.com content is pretty exportable as WXR, and once into a self-hosted WP install is _very_ exportable; there are all sorts of tools to get at WP content in different ways.