I spoke too soon. Got a reply today. Authorized KnCMiner Forum is NOT in the plans to return:
Typical KnC, they just nuke all of the information, screw the customers.I have never seen such an amateur work, and I am deeply disappointed. Apart from the ASIC chip itself, KNC machines look like a high-school science project.
Good to see someone else confirming the pitiful excuse of KnC's work. 
The torx bit is just sad. Does that Cube still work? I don't know though, I think that may be an insult to high school students, lol. Maybe more like...trained monkeys? 
KnC's Neptune Reflash Guide did not get me up and running with my BBB, so I edited/wrote my own:
01) Download: http://www.kncminer.com/downloads/support/naptune/SD_Neptune_rc6.zip
(haha, we have Nappys now everyone!
So true, KnC is a soiled nappy)02) Format the microSD card with the FAT32 file system and make bootable as HDD with software like RMPrepUSB, or similar.
03) Unzip the contents of the archive onto the microSD card.
04) Turn the miner off via the power supply switch and disconnect from the wall.
05) Disconnect all ASIC boards from the controller.
06) Insert the microSD card into the BeagleBone Black's microSD card slot.
07) Reconnect the power supply and turn the power on. Leave the ASICs disconnected.
08) Please wait while internal MMC flash memory is reprogrammed. There will be a sequence of LED light flashes as follows:
- A bright white light will flash once.
- A blue light will come on for around 30 seconds.
- A green light will flash constantly, once the MMC has been programmed and the procedure is completed.
09) Turn the miner off and disconnect from the wall.
10) Eject the micro SD card from the controller board.
11) Securely reconnect the ASICs, followed by the power supply and turn the miner on.
12) The miner should now boot normally, displaying Neptune_rc6 and the IP address on LCD equiped models.
(We were too cheap to include LCDs on the Bonus Miners. SOL.)
If you follow KnC, you'll screw around with attempting to format with the old FAT file system, then it still won't work, because the BBB just boots from the internal memory and laughs at you.
I later heard that you might be able to press the small "boot" button on the BBB to boot from SD? I have no idea there.