Business Week has an interesting article about Apple's profit margins on the iPod Nano . Apparently it costs $90.18 in materials and $8 to assemble the 2 GB Nano which retails for $199. That's almost 50% profit margin! No wonder the iPods are a real cash cow for Apple. The article also lists some of the companies who benefited from the Nano such as Cypress Semiconductor ( CY ), Portal Player ( PLAY ) and Samsung.