I know people who run galleries and such things, who find Wordpress too complicated. Markdown is great because they can do rich formatting without needing to learn HTML, but with more control that WYSIWYG. Maybe you want to post a tutorial to add a CNAME to Dropbox. I don't think they really care that the urls would look like /u/xyz/file.html|jpg. What's missing is a markdown editor and light CMS, perhaps.