I've decided that any content I produce in the future will be completely under my control, and in this context I've been very pleased with the Octopress/Jekyll setup I installed for the Rails Tutorial news feed (http://news.railstutorial.org/) once the Posterous shutdown date was announced. That said, I'm really happy that Garry and Brett have made Posthaven, and I'm excited to see them come so far so fast.