http://www.cnx-software.com/2013/08/08/mc-hck-is-a-5-arm-development-board-powered-by-freescale-k20-mcu/ awww, this one's awesome! 32QFN $1.60 in 1k volumes, and it's damn good. even has I2S so could be connected to an audio driver IC... which ironically would be about the same price - hilarious. l.