Finally! Beta 2 is available for download from http://msdn.microsoft.com/directx/XNA/
This includes the Content Pipeline, so now you have that in your hands, I'll be posting and answering questions about how the whole thing works. Let me know if there are any particular topics you'd like me to write about.
In the meantime, I'm going back to bed. This always happens to me for some reason: as soon as the bug count hits zero at the end of a project, I come down with the most miserable cold 🙂