Steve Mallett has just announced a new project called DataLibre. The principles surrounding the project are best described in Steve's discussion on Applying Distributed XML to The Open Source Paradigm Shift that I referenced in an earlier blog post.
While I'll still be busy for the next few weeks as I finish writing PHP Security, I plan to play a part in Steve's efforts with a specific project of my own, tentatively named Blogosaur. I'll provide more details about that soon.
For now, check out DataLibre and join the effort to own your data.