That's why Tuesday's blockbuster, that you can publish to Facebook, and update the posts (the key new feature) didn't make much of a splash.
I should also say that I have been meeting with people from Facebook now for about three months. The collaboration has been excellent. Reminds me of the work I did with Microsoft in the late 90s that led to XML-RPC. There was magic there, and there's magic now.
I want Facebook to become a first class publishing surface, accessible from tools that run outside the Facebook environment. With this, the tools can overcome one major objection, that they don't connect with the powerful engagement features of Facebook, and the huge user base. And, even more important, it will make it possible for new tools to gain traction, because users will not have to choose between an attractive idea and all their readers and friends. They can have both.
I would be surprised if WordPress and Tumblr don't implement this connection, making it possible to hot-link content from their environment to Facebook. They already implement the other direction, supporting APIs that allow tools to publish into them. This should be something every publishing platform supports. By showing everyone the demo app, you now know what to ask for, and what to show the developers if they don't believe.
As users, there's no reason to publish to a locked-up environment. You shouldn't be doing it. If you can't get content into the platform from the outside, or get it out once it's in there, then you should stay away. It's bad for the web. I rarely point to articles on such platforms. And you shouldn't put your best ideas in there.