@knc1: Not that I know of. (Speaking of, there are some vague NFS mentions in there too, but then I have no idea how to drop to the recovery shell without serial access).
@Beekr25: Don't boot with the Kindle plugged in (it's explained in more details in the USBNet doc). I'm pretty sure it shouldn't hang the boot process more than 15s, though. (But then again, since it doesn't work, I didn't spend an extraordinary amount of time looking into it on a wide range of devices. When the kernel throws a huge fit telling me the device is busy while trying to reload the USB controller, I obey and unplug it ^^).
Last edited by NiLuJe; 11-08-2012 at 07:33 PM.