Here is another project you might be interested in:
While fiddling with a Beaglebone Black Rev.C I run into a problem while trying to backup the eMMC content to external SD card. eLinux.org provides a description that I followed. However, when booting from SD card, I got only a short flashing USR0 LED and then a steady one. The resulting backup file BeagleBoneBlack-eMMC-image-XXXXX.img.gz was only 1kB in size with zero content.