Awesome! This is a great insurance policy for those who have not yet bricked their kindles. Let's hope that people use it. But then, some of us did not get around to backing up our /dev/mmcblk0 when we had the chance.
I still think a data.tar.gz (or newer .stgz method) that drops diags /usr/local is in order, for "boy stuck under the tree" cases.
P.S. I added your "relevant K5 images" mirror link to the "forensic images" links in the first post, and to the bottom of the "forensic images" pastebin. Perhaps we should mention this "pre-brick insurance" hack at the top of the first post as well... This hack needs a name, so what do you want to CALL it?