Let’s face it: America’s fickle. We change our minds about products as fast as we can tweet about them, so what’s cool today may not be as alluring tomorrow. This makes life hard for marketing directors since brands can lose favor with the public if they don’t predict trends correctly. Even the biggest brands are in danger of losing their cultural icon status if they don’t keep up with the times. Here are 10 big brands, recent and old alike, that simply stopped being cool. Read them at Preity Smith’s blog…