I have been looking for a way to get a decent static blog software that accepts org-mode files as input format for a while. So far I am very satisfied with http://getnikola.com/ in combination with the org-mode plugin http://plugins.getnikola.com/#orgmode. Performance wise it is still faster than the pretty slow wordpress and the installation effort it took was acceptable. Check http://getnikola.com/handbook.html#why-static on some reasons why to use a static site generator as opposed to dynamic site generation.
As soon as I find the time to do so I will try to host the commenting service myself with http://posativ.org/isso/docs/quickstart/.