I just finished an Arch Linux image for the beaglebone black…
https://www.dropbox.com/s/lbk1q9isb7h0q7x/BBB-arch-012614.img.xz
Installation method: xz -cd /path/to/image > /dev/sdX
SSH: root @ alarm
Password: root
don’t forget to resize your SD card, and to hold down the usr button while trying to boot from SD.
enjoy!