iPod hacking due to acoustic computing

Via BoingBoing:

Some months ago, an enterprising hacker accomplished a key hack in the eventual opening of the iPod: Nils Schneider reverse-engineered the iPod’s firmware. This means that hackers now have the means to move data off of and onto the iPod at will, but more interesting is how he accomplilshed it. He figured out how to get the iPod to convert its firmware to a series of squeaks (essentially, to play it like a piece of music) and then converted the music back into software.