As i should have stated clearly enough from the start, what i'm
suggesting is generating sound waves out of the shape, not mapping it
to pitches. The idea is that the amount of small details in it would
result in enough high frequencies to be audible, even at very slow speeds.

The problem is that to realize this, i would need VERY large picture
of it, at least 40 000 pixels wide, just for a one-second version,
preferably millions of pixels, as well as software capable of handling
it. If someone can make a simple 2-color BMP of the Mandelbrot set in
such a high resolution, i might be able to make the conversion to
audio myself.

I also started threads on it here:
http://acapella.harmony-central.com/forums/showthread.php?t=2045446
http://launch.groups.yahoo.com/group/MakeMicroMusic/messages