Audioino?

johncc wrote:

Aren't we talking about a potential use-case where the user could reprogram it by playing a wav file on their iOS/Android/laptop and an off-the-shelf 3.5mm patch plug?

like you mentioned, this guy used the audio bootloader:
http://tadpol.org/projects/AvrianJump.html

sdinnu wrote:

Chris, is there anyway you could please recompile a functional bootloader for the atmega328p chip?

At the moment I have not so much time and I programmed the bootloader almost a year ago, so I forgott many things.
Couldn't you use for the "first shot" an Atmega168 to see if the bootloader fits your needs?