Hooked up an @Adafruit_Industries 8x8 LED matrix to the BeagleBone Black and ran their Python demo (via @element14 )
http://www.element14.com/community/community/knode/single-board_computers/next-gen_beaglebone/blog/2013/11/22/adafruit-8x8-led-matrix-controlled-by-beaglebone-black