I saw the above image in a recent BCG publication called “Convergence 2.0” (warning: PDF link).  I thought it was interesting as it shows just how hard Apple works to sell iPods: they don’t make any money off of the music store ($14 covers their costs and affords a slim profit), but they make a killing off of iPod hardware.  I’d always heard this and it’s interesting to see the numbers to back it up.