I still have an OpenMoko GTA-02 sitting about 2m from where I am sitting, I dont know how many years since I have tried to boot it, but damn that hockey puck design looks tough.
GDC has delivered before but even the mokos were way behind if I recall correctly, that said it has been declared by GDC that the Neo900 is dead.
The main problem with using an OpenMoko in my experience there was never a firmware/OS which was reliable enough to actually take incoming calls more than 75% of the time.