Wow, this is great news, and thanks for the version updates throughout the thread.
This is very exciting - it's like the JTAG hack for 360s, but without the fuse limitations. Do we know if the install diagram is similar for all models?
Perhaps a good homebrew software flasher will be worked on, especially with the new SDK leak. If this method proves reliable, I think I'll mount my Teensy inside and put a mini USB port on the case.