The question is how much money. From a consumer stand point, I think a healthy 10-15% profit margin after ALL costs are factored in is very reasonable. I expect the company to walk away with at least 10% after they pay for everything to get the product to me (employees, stores, shipping, production, design, the whole shabang). If a company starts to develop a higher profit margin, like the one Apple is currently enjoying, then no doubt shareholders are happy, but what about the rest of us? At times, Apple's margins on Macs can go as high as 30%. Don't you think that's a big out of line? I don't mind if Apple makes money off of me, heck, they should if I want to buy another Apple product in the future, but it can go too far.
As for these Nanos, I don't think Apple is making too much money off of them. For the 8GB model, the report indicated a materials cost of $82.85. Factor in the cost of designing, producing, shipping, packing, advertising, keeping Apple Stores with enough inventory, setting aside a few for Lemon problems, and the cost of updating iTunes (and keeping it working smoothly), we can probably guess that the cost of the Nano is probably quite a lot more than $83. My guess is that Apple probably makes a good $45 off of each 8GB model, which is healthy, but also perfectly fine. Even though the margin is above 20%, there are few MP3 players that offer a better storage/price ratio, which means that the customer still wins because they get better design, more options, and a very nice piece of software to go with it.