i imported all my posterous, other blogs stuff into jekyll: https://github.com/mojombo/jekyll/wiki/Blog-Migrations (mind you, the original posterous migration from jekyll does not work anymore, so you will have to use this one https://github.com/pepijndevos/jekyll/blob/patch-1/lib/jekyl... )

then with jekyll you can host your blog as github pages - this, to me, seems like the best option to anything that is out there.