i heard the dac on those raspberry pi boards leave a lot to be desired. Have you looked into a usb dac for it? also. you may want to look into the pcduino in case you want to get fancy. it has an integrated atmel chip and runs the arduino ide natively, is faster and all around upgrade to the pi.
oh wait... your "raspyfi" wasn't a typo! just looking into this now... interesting!
Gorgeous car !! Will definitely follow this build.
Very nice so far!
So says latinmaxima, so it shall be! now Free
any update on the raspyfi? :)