Lucas, I think you're being unfair to the dotCloud community. If I scratch my itch on dotCloud and share a cool Wordpress [1] or Thin [2] stack, how is that not open?

[1] https://github.com/qpleple/wordpress-on-dotcloud [2] https://github.com/jpetazzo/thin

At the same time you mention in your blog: "Appfog has secret sauce that we did not contribute to the open source project, ways to optimize PHP and the experience around PHP".

For the sake of openness, I encourage you to share your secret PHP sauce as a custom dotCloud build. There's a whole community of hackers doing the same.