We hate to interrupt the Apple lovefest with a tiresome observation about currency markets. But for anyone still outside the reality distortion field, here's some required reading: A Wall Street Journal article about the rise in value of the South Korean won (reg. required). Here's why this is bad news for the iPhone.What's an iPhone? Mostly a metal and plastic package for a flash-memory chip and an LCD screen. And where do those come from? Largely from South Korea, home to Samsung, LG, and countless other parts-makers. Those poor souls get paid in dollars, which are worth less as the won gets more valuable. Apple, whose profits have been supercharged by rapidly falling component prices over the past year, will have a tough time negotiating lower prices. If the won appreciates further, forget hopes of an iPhone cheaper than its current $499 price tag.