Yepp... That's the device, not just a partition. Don't ask why. And of course, I didn't have a backup, because I was sure it would never happen.
Anyway, could somebody please send me the first 65 4k-blocks of a Kindle Touch (the version shouldn't matter), i.e.
dd if=/dev/mmcblk0 of=rescue.bin bs=4096 count=65
Thanks a ton!
Oh my, this is embarassing...