A great example of using multiple information sources to ferret out Apple’s internal projections for iPod/iPhone sales:
Digitimes via EE Times Asia reports that Apple is negotiating to buy 500 million Samsung NAND flash chips.
These are 4 GBit chips, so that means that a 4 GByte iPod nano or
iPhone would require eight of these; an 8 GByte iPhone would need 16.
Averaging out those numbers says that Apple is looking for flash
supplies for somewhere around 50 million iPods and iPhones over the
next nine months.