I was looking at the docs for the SDK today. I'm interested to see if I need to get an OpenMoko to play with this sucker. However, I haven't been able to find the OS itself, just references to the eclipse plugin.
Even worse is this quote from the FAQ:
Android does not currently support development of third party applications in native code (C/C++).
Not as open as we had all hoped. I'll keep looking, I hope it gets better.